The case of early Copernicanism: Epistemic luck vs. predictivist vindication |

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Fri Sep 29 2023 02:38:24 (1 day)

# 1.

Crupi, Vincenzo (2023) The case of early Copernicanism: Epistemic luck vs. predictivist vindication. [Preprint]

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Fri Sep 29 2023 02:37:26 (1 day)

# 2.

List, Christian (2023) A quadrilemma for theories of consciousness. [Preprint]

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Fri Sep 29 2023 02:32:43 (1 day)

# 3.

Menon, Tushar and Read, James (2023) Some remarks on recent formalist responses to the Hole Argument. [Preprint]

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Fri Sep 29 2023 02:32:17 (1 day)

# 4.

Menon, Tushar (2023) On algebraic object naturalism and metaphysical indeterminacy in quantum mechanics. [Preprint]

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Fri Sep 29 2023 02:31:41 (1 day)

# 5.

Menon, Tushar (2023) Dynamical Substantivalism. [Preprint]

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Fri Sep 29 2023 02:30:48 (1 day)

# 6.

Menon, Tushar (2023) Spacetime functionalists should be inferentialists. [Preprint]

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Fri Sep 29 2023 02:26:27 (1 day)

# 7.

Antoniou, Antonis (2023) Robustness and Dark-Matter Observation. Philosophy of Science, 90 (3). pp. 629-647.

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Fri Sep 29 2023 02:21:46 (1 day)

# 8.

Muthukrishnan, Siddharth (2023) Unpacking Black Hole Complementarity. [Preprint]

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J.E. Horvath (IAG-USP, São Paulo, Brazil)

Thu Sep 28 2023 09:26:46 (2 days)

# 9.

An analysis of contemporary Cosmology is presented, with the aim of identifying the elements present in it according to the scientific program structure created by I. Lakatos. We look at some modern controversies from this point of view and clarify the meaning of issues related to them within this context.

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Siddhant Das

Thu Sep 28 2023 09:26:45 (2 days)

# 10.

I recount here my association with Prof. Detlef D\”urr leading to our memorable research collaboration on arrival-time distributions in quantum mechanics. He influenced my life, both personally and professionally, as few others have or ever will. Detlef is my role model for what a brilliant, discerning scientist, academic, and mentor can and should be.

The “arrival-time problem” in quantum mechanics is examined selectively, with an emphasis on the arrival-time distributions of Bohmian particles. In what follows, the “exotic” Bohmian arrival-time distributions of spin-polarized electrons accelerating down a cylindrical waveguide [S. Das and D. D\”urr, Sci. Rep. 9: 2242 (2019)], and some variations thereof are discussed. I shall not go into the mathematical treatment more than is necessary to spell out the key results. The intention is to document the circumstances and motivations underlying the ideas.

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Eleftherios-Ermis Tselentis, Ämin Baumeler

Thu Sep 28 2023 09:26:28 (2 days)

# 11.

We derive multiparty games that, if the winning chance exceeds a certain limit, prove the incompatibility of the parties’ causal relations with any partial order. This, in turn, means that the parties exert a back-action on the causal relations; the causal relations are dynamical. The games turn out to be representable by directed graphs, for instance by an orientation of the M\”obius ladder. We discuss these games as device-independent tests of spacetime’s dynamical nature in general relativity. To do so, we design a relativistic setting where, in the Minkowski spacetime, the winning chance is bound to the limits. In contrast, we find otherwise tame processes with classical control of causal order that win the games deterministically. These suggest a violation of the bounds in gravitational implementations. We obtain these games by uncovering a “pairwise central symmetry” of the correlations in question. This symmetry allows us to recycle the facets of the acyclic subgraph polytope studied by Gr\”otschel, J\”unger, and Reinelt in the mid-80s for combinatorial optimization. In addition, we derive multiparty games in a scenario where the polytope dimension grows only linearly in the number of parties. Here, exceeding the limits not only proves the dynamical nature of the causal relations, but also that the correlations are incompatible with any global causal order.

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Wed Sep 27 2023 15:13:37 (2 days)

# 12.

Christian, Joy (2023) Bell’s Theorem Begs the Question. [Preprint]

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Wed Sep 27 2023 15:13:05 (2 days)

# 13.

Norton, John D (2022) The Metaphysics of Causation: An Empiricist Critique. [Preprint]

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Tue Sep 26 2023 03:36:27 (4 days)

# 14.

Filomeno, Aldo (2023) How bad is the postulation of a low entropy initial state of the universe? [Preprint]

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Tue Sep 26 2023 03:27:49 (4 days)

# 15.

Evans, Peter W. and Milburn, Gerard J. and Shrapnel, Sally (2023) How clocks define physical time. [Preprint]

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Mon Sep 25 2023 08:22:11 (5 days)

# 16.

Gao, Shan (2023) Is superluminal signaling possible in collapse theories of quantum mechanics? Foundations of Physics, 53. ISSN 0015-9018

]]>Using quantum foundations we give a new demonstration of a relation, existing in spin measurements, that engages a new subalgebra with a new commutation relation that exists during the measurement of a spin coordinate. Since the given projector is unique, we do not find a contradiction with the von Neumann postulate that an unique Hermitean operator is associated with the given observable.

]]>Signature of Einstein-Cartan theory. (arXiv:2309.11536v1 [gr-qc]) |

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Bruno Arderucio Costa, Yuri Bonder

Fri Sep 22 2023 09:55:02 (23 hours)

# 1.

We study the physical effects of torsion as predicted by the Einstein-Cartan theory in the test particle approximation and the non-relativist limit. We first present the corresponding non-relativistic Hamiltonian for a 2-spinor. Then, we solve an idealized reflection and transmission problem for a non-relativistic spin-$\frac{1}{2}$ beam travelling across a spin-polarized target. We identify deviations in the spin polarizations of the reflected and transmitted as observables capable of distinguishing Einstein-Cartan from standard general relativity. If measured, this effect would constitute compelling evidence for the presence of spacetime torsion.

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Hansol Noh, Paul M. Alsing, Warner A. Miller, Doyeol Ahn

Fri Sep 22 2023 09:54:48 (23 hours)

# 2.

The fundamental theories of general relativity and quantum mechanics are incompatible, presenting a significant theoretical challenge. General relativity offers an effective description of gravity and large-scale dynamics, while quantum mechanics describes phenomena for atomic- to Planck-scale. The Wigner rotation angle (WRA) of a photon induced by gravity, where relativistic effects become observable in its quantum spin state, is a significant point of interest as a promising candidate for direct observation near Earth by considering its small but measurable order. In this paper, we reveal that the momentum-dependent WRA displays a non-reciprocal characteristic. This distinct behavior leads to a measurable relative WRA difference between two paths of an interferometer within the Earth’s gravitational field, while the WRA of a photon has conventionally been viewed as having a trivial value on a closed loop. Building on this finding, we propose an experiment that can be used to test the theoretical framework of the WRA induced in curved spacetime through the use of the Hong-Ou-Mandel (HOM) quantum interference effect for photons in near-Earth orbits. We show that in our proposed experiment the coincident photon counting rate depends on the difference of the momentum-dependent WRA in the two arms of an interferometer.

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Jens Chluba, Luke Hart

Fri Sep 22 2023 09:54:47 (23 hours)

# 3.

Fundamental physical constants need not be constant, neither spatially nor temporally. — This seeming simple statement has profound implications for a wide range of physical processes and interactions, and can be probed through a number of observations. In this chapter, we highlight how CMB measurements can constrain variations of the fine-structure constant and the electron rest mass during the cosmological recombination era. The sensitivity of the CMB anisotropies to these constants arises because they directly affect the cosmic ionization history and Thomson scattering rate, with a number of subtle atomic physics effects coming together. Recent studies have revealed that variations of the electron rest mass can indeed alleviate the Hubble tension, as we explain here. Future opportunities through measurements of the cosmological recombination radiation are briefly mentioned, highlighting how these could provide an exciting avenue towards uncovering the physical origin of the Hubble tension experimentally.

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Wed Sep 20 2023 23:35:28 (2 days)

# 4.

Weinstein, Galina (2023) Reframing the Event Horizon: The Harlow-Hayden Computational Approach to the Firewall Paradox. [Preprint]

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Wed Sep 20 2023 23:28:46 (2 days)

# 5.

Andersen, Holly (2023) Every View is a View From Somewhere: Pragmatist Laws and Possibility. [Preprint]

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Katherine Wright

Wed Sep 20 2023 18:00:00 (2 days)

# 6.

Author(s): Katherine Wright

The concurrent analysis of two measurements of a biochemical signaling network can provide more information than two separate probes of the datasets.

[Physics 16, s138] Published Wed Sep 20, 2023

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Tue Sep 19 2023 04:42:30 (4 days)

# 7.

Fay, Jonathan (2023) Mach’s Principle and Mach’s Hypotheses. [Preprint]

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Tue Sep 19 2023 04:38:11 (4 days)

# 8.

Van Strien, Marij (2023) Why Bohm was never a determinist. [Preprint]

]]>Quantum entanglement is a unique property of quantum systems, where the states of two particles become correlated in such a way that the state of one particle cannot be described independently of the other. Entangled quantum systems can connect to the environment via a Bell state measurement. This applies, for example, to teleportation and entanglement swapping. Although the results are well understood, it is not entirely clear whether they involve nonlocal action or whether they are predetermined because quantum mechanics does not provide this information. The best way to clarify this is to use a model, provided that it predicts the key measurement results. Models based on the fact that the partners of an entangled pair have the same value of a statistical parameter cannot be applied here. This is because the partner particles of the resulting entangled states after a teleportation or an entanglement swapping never had contact before. The question then is, what connects entangled photons? Therefore, this paper presents a local realistic model that reproduces the quantum mechanical predictions for expectation values with polarization measurements, but is not based on shared statistical parameters. Instead, the coupling of the entangled particles is based on initial conditions and conservation of spin angular momentum. The model refutes Bell’s theorem and also explains teleportation and entanglement swapping in a local way. It is also shown which error in Bell’s derivation leads to Bell’s inequality failing to correctly describe the relationships between expectation values from quantum mechanics. The manuscript is thus a step forward toward a complete theory describing quantum physical reality as thought possible by Einstein, Podolsky, and Rosen.

]]>What is it that ‘waves’ in wave mechanics? It is thought that the waves represented by the wave function are not waves *of* anything. But this sits uneasily with the seeming physical significance of the phase relations between the linearly superposed elements of the wave function. For example, motion in quantum mechanics is described by the interference of superposed wave functions belonging to different energies, controlled by the phase relations between them. Quantum field theory, too, remains rooted in the ‘harmonic paradigm’ of waves and wave packets. So some think there is more to be said. The present article seeks to contribute to the ongoing debate about the ontology and meaning of the wave function by offering a new perspective on what it is that ‘waves’ in quantum mechanics. It postulates an underlying periodic physical process that all spin-half particles are taken to undergo in the ‘shadow’ of the Heisenberg uncertainty principle. It shows how the underlying process can account for the waves and wave packets of the quantum-mechanical formalism (including in the spin-one case)—the mathematical formalism ‘modelling’ the underlying actual physical process. The new perspective seems to provide insight into other aspects of quantum mechanics as well, including its linear superposition principle, the Schrödinger *Zitterbewegung*—and, rather unexpectedly, into the quantum field-theoretical problem of why a finite particle mass and charge is always observed despite the potentially infinite field energy surrounding a particle.

Bell inequalities violation is generally interpreted to rule out local and/or non-contextual hidden variables theories. Recently, an actual hidden variables model in matrix mechanics formulation was presented which is based on ontologically classical endogenous motion. All results of standard matrix mechanics are reproduced. A critical feature of the model is that it reproduces the mathematics of quantum observables including measurability, and hence quantum experiments. This feature can be a characteristic of a given class of hidden variables theories. There is then a direct conflict with the consensus interpretation of violation suggesting a need to reconsider Bell’s theorem. It is found there is an additional assumption restricting the type of hidden variables theories inequalities represent by excluding those which reproduce quantum mathematics. Any theory which reproduces the mathematics of quantum observables is thereby not subject to Bell-type constraints.

]]>Reply to Comment on “Weak values and the past of a quantum particle”. (arXiv:2309.07599v1 [quant-ph]) |

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Jonte R Hance, John Rarity, James Ladyman

Fri Sep 15 2023 13:00:24 (20 hours)

# 1.

We here reply to a recent comment by Vaidman on our paper, “Weak values and the past of a quantum particle”, which we published in Physical Review Research. In his Comment, he first admits that he is just defining (assuming) the weak trace gives the presence of a particle — however, in this case, he should use a term other than presence, as this already has a separate, intuitive meaning other than “where a weak trace is”. Despite this admission, Vaidman then goes on to argue for this definition by appeal to ideas around an objectively-existing idea of presence. We show these appeals are flawed, and rely on their own conclusion — that there is always a matter of fact about the location of a quantum particle.

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T. Banks (NHETC and Dept. of Physics and Astronomy, Rutgers University)

Fri Sep 15 2023 13:00:23 (20 hours)

# 2.

We argue that no theoretical model of quantum gravity in a causal diamond whose boundary has finite maximal area, can be verified with arbitrary precision by experiments done in that diamond. This shows in particular that if our own universe remains in an asymptotically future de Sitter state for a time long enough for our local group of galaxies to collapse into a black hole, then no information processing system with which we can communicate could ever distinguish between many competing models of the AsdS universe. This article is written in an attempt to be accessible to a wide audience, so certain elementary facts about quantum mechanics are reviewed, briefly.

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Matthew Edmonds, Antonino Flachi, Marco Pasini

Fri Sep 15 2023 13:00:11 (20 hours)

# 3.

Nonlinearities in the dispersion relations associated with different interactions designs, boundary conditions and the existence of a physical cut-off scale can alter the quantum vacuum energy of a nonrelativistic system nontrivially. As a material realization of this, we consider a 1D-periodic rotating, interacting non-relativistic setup. The quantum vacuum energy of such a system is expected to comprise two contributions: a fluctuation-induced quantum contribution and a repulsive centrifugal-like term. We analyze the problem in detail within a complex Schoedinger quantum field theory with a quartic interaction potential and perform the calculations non-perturbatively in the interaction strength by exploiting the nonlinear structure of the associated nonlinear Schroedinger equation. Calculations are done in both zeta-regularization, as well as by introducing a cut-off scale. We find a generic, regularization-independent behavior, where the competition between the interaction and rotation can be balanced at some critical ring-size, where the quantum vacuum energy has a maxima and the force changes sign. The inclusion of a cut-off smoothes out the vacuum energy at small distance but leaves unaltered the long distance behavior. We discuss how this behavior can be tested with ultracold-atoms.

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Patrick Hayden, Jinzhao Wang

Fri Sep 15 2023 13:00:11 (20 hours)

# 4.

The Bekenstein bound posits a maximum entropy for matter with finite energy confined to a spacetime region. It is often interpreted as a fundamental limit on the information that can be stored by physical objects. In this work, we test this interpretation by asking whether the Bekenstein bound imposes constraints on a channel’s communication capacity, a context in which information can be given a mathematically rigorous and operationally meaningful definition. We first derive a bound on the accessible information and demonstrate that the Bekenstein bound constrains the decoding instead of the encoding. Then we study specifically the Unruh channel that describes a stationary Alice exciting different species of free scalar fields to send information to an accelerating Bob, who is therefore confined to a Rindler wedge and exposed to the noise of Unruh radiation. We show that the classical and quantum capacities of the Unruh channel obey the Bekenstein bound. In contrast, the entanglement-assisted capacity is as large as the input size even at arbitrarily high Unruh temperatures. This reflects that the Bekenstein bound can be violated if we do not properly constrain the decoding operation in accordance with the bound. We further find that the Unruh channel can transmit a significant number of zero-bits, which are communication resources that can be used as minimal substitutes for the classical/quantum bits needed for many primitive information processing protocols, such as dense coding and teleportation. We show that the Unruh channel has a large zero-bit capacity even at high temperatures, which underpins the capacity boost with entanglement assistance and allows Alice and Bob to perform quantum identification. Therefore, unlike classical bits and qubits, zero-bits and their associated information processing capability are not constrained by the Bekenstein bound.

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Fri Sep 15 2023 07:47:27 (1 day)

# 5.

Kelley, Mikayla (2023) A Contextual Accuracy Dominance Argument for Probabilism. [Preprint]

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Fri Sep 15 2023 07:37:15 (1 day)

# 6.

March, Eleanor and Wolf, William J. and Read, James (2023) On the geometric trinity of gravity, non-relativistic limits, and Maxwell gravitation. [Preprint]

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Ryan Wilkinson

Wed Sep 13 2023 18:00:00 (2 days)

# 7.

Author(s): Ryan Wilkinson

A mathematical model shows how increased intricacy of cognitive tasks can break the mirror symmetry of the brain’s neural network.

[Physics 16, s133] Published Wed Sep 13, 2023

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Robert S. Eisenberg

Wed Sep 13 2023 09:26:35 (2 days)

# 8.

Maxwell defined a ‘true’ or ‘total’ current that is quite different from the definition of current used by most scientists today. He said that “… true electric current … is not the same thing as the current of conduction but that the time variation of the electric displacement must be taken into account in estimating the total movement of electricity”. We reconcile these views and show that true current are a universal property of electrodynamics independent of properties of matter, without the approximation of a dielectric constant. The resulting Maxwell Current Law is a generalization ofKirchhoff Law of Conduction Current used in circuit analysis, but true currents need not be confined to circuits. The universal Maxwell Current Law can be applied to complex circuits as they work in our computers on nanosecond time scales. It also can be applied to the signaling systems and to mitochondria of living systems. The Maxwell Current Law clarifies flows of electrons, protons, and ions in mitochondria that generate ATP, the molecule used to store chemical energy throughout life. This approach reinterprets the classical chemiosmotic hypothesis of ATP production. The conduction current of protons in mitochondria is driven by the protonmotive force including its component electrical potential, just as in the classical chemiosmotic hypothesis. The conduction current is, however, just part of the true current of Maxwell. Maxwell’s current does not accumulate, in contrast to conduction current of protons which does accumulate. Details of accumulation do not have to be considered in analyses of true current. The treatment here allows the chemiosmotic hypothesis to take advantage of the knowledge of current flow in the physical and engineering sciences, particularly its Kirchhoff and Maxwell Current Laws. Knowing the current means knowing an important part of the mechanism of ATP synthesis.

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Wed Sep 13 2023 08:43:12 (3 days)

# 9.

Gasco, Enrico (2022) The model of thin shell in General Relativity. Proceedings of the SISFA 42nd Annual Conference. pp. 183-189.

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Wed Sep 13 2023 08:00:21 (3 days)

# 10.

Chen, Lu and Read, James (2023) Is the metric signature really electromagnetic in origin? [Preprint]

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Mark Buchanan

Mon Sep 11 2023 08:00:00 (5 days)

# 11.

Nature Physics, Published online: 11 September 2023; __doi:10.1038/s41567-023-02193-2__

A post-particle future

]]>Questionable and Unquestionable in Quantum Mechanics |

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Sat Sep 09 2023 09:09:50 (1 hour)

# 1.

Szabó, László E. and Gömöri, Márton and Gyenis, Zalán (2023) Questionable and Unquestionable in Quantum Mechanics. [Preprint]

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Sat Sep 09 2023 09:09:09 (1 hour)

# 2.

Cuffaro, Michael E. (2023) Review of Slobodan Perović’s From Data to Quanta — Niels Bohr’s Vision of Physics. Philosophy of Science. ISSN 1539-767X

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Lu Chen

Fri Sep 08 2023 09:13:43 (1 day)

# 3.

I defend algebraicism, according to which physical fields can be understood in terms of their structural relations without reference to a spacetime manifold, as a genuine relationalist view against the conventional wisdom that it is equivalent to substantivalism, according to which spacetime exists fundamentally. I criticize the standard version of algebraicism that is considered equivalent to substantivalism. Furthermore, I present alternative examples of algebraicism that better implement relationalism and showcase their distinct advantages over substantivalism or its standard algebraic counterpart.

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Jean-Luc Lehners, Jerome Quintin

Fri Sep 08 2023 09:13:42 (1 day)

# 4.

Many cosmological models assume or imply that the total size of the universe is very large, perhaps even infinite. Here we argue instead that the universe might be comparatively small, in fact not much larger than the currently observed size. A concrete implementation of this idea is provided by the no-boundary proposal, in combination with a plateau-shaped inflationary potential. In this model, opposing effects of the weighting of the wave function and of the criterion of allowability of the geometries conspire to favour small universes. We point out that a small size of the universe also fits well with swampland conjectures, and we comment on the relation with the dark dimension scenario.

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Howard M. Wiseman, Eric G. Cavalcanti, Eleanor G. Rieffel

Fri Sep 08 2023 09:13:42 (1 day)

# 5.

A recent paper by two of us and co-workers, based on an extended Wigner’s friend scenario, demonstrated that certain empirical correlations predicted by quantum theory (QT) violate inequalities derived from a set of metaphysical assumptions we called “Local Friendliness” (LF). These assumptions are strictly weaker than those used for deriving Bell inequalities. Crucial to the theorem was the premise that a quantum system with reversible evolution could be an observer (colloquially, a “friend”). However, that paper was noncommittal on what would constitute an observer for the purpose of an experiment. Here, we present a new LF no-go theorem which takes seriously the idea that a system’s having *thoughts* is a sufficient condition for it to be an observer. Our new derivation of the LF inequalities uses four metaphysical assumptions, three of which are thought-related, including one that is explicitly called “Friendliness”. These four assumptions, in conjunction, allow one to derive LF inequalities for experiments involving the type of system that “Friendliness” refers to. In addition to these four metaphysical assumptions, this new no-go theorem requires two assumptions about what is *technologically* feasible: Human-Level Artificial Intelligence, and Universal Quantum Computing which is fast and large scale. The latter is often motivated by the belief that QT is universal, but this is *not* an assumption of the theorem. The intent of the new theorem is to give a clear goal for future experimentalists, and a clear motivation for trying to achieve that goal. We review various approaches to QT in light of our theorem. The popular stance that “quantum theory needs no interpretation” does not question any of our assumptions and so is ruled out. Finally, we quantitatively discuss how difficult the experiment we envisage would be, and briefly discuss milestones on the paths towards it.

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Fri Sep 08 2023 08:44:12 (1 day)

# 6.

Chen, Eddy Keming (2023) Laws of Physics. [Preprint]

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Fri Sep 08 2023 08:42:40 (1 day)

# 7.

Read, James (2023) Review of “Teleparallel Newton-Cartan Gravity”, by Philip K. Schwartz. [Preprint]

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Lu Chen

Thu Sep 07 2023 10:16:22 (1 day)

# 8.

I develop a new view of the structure of space–called infinitesimal atomism–as a reply to Zeno’s paradox of measure. According to this view, space is composed of ultimate parts with infinitesimal size, where infinitesimals are understood within the framework of Robinson’s nonstandard analysis. Notably, this view satisfies a version of additivity: for every region that has a size, its size is the sum of the sizes of its disjoint parts. In particular, the size of a finite region is the sum of the sizes of its infinitesimal parts. Although this view is a coherent approach to Zeno’s paradox and is preferable to Skyrms’s (1983) infinitesimal approach, it faces both the main problem for the standard view (the problem of unmeasurable regions) and the main problem for finite atomism (Weyl’s tile argument), leaving it with no clear advantage over these familiar alternatives.

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Lu Chen

Thu Sep 07 2023 10:16:21 (1 day)

# 9.

In this paper, I advance an original view of the structure of space called \textit{Infinitesimal Gunk}. This view says that every region of space can be further divided and some regions have infinitesimal size, where infinitesimals are understood in the framework of Robinson’s (1966) nonstandard analysis. This view, I argue, provides a novel reply to the inconsistency arguments proposed by Arntzenius (2008) and Russell (2008), which have troubled a more familiar gunky approach. Moreover, it has important advantages over the alternative views these authors suggested. Unlike Arntzenius’s proposal, it does not introduce regions with no interior. It also has a much richer measure theory than Russell’s proposal and does not retreat to mere finite additivity.

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Emilio Elizalde

Thu Sep 07 2023 10:16:20 (1 day)

# 10.

Albert Einstein visited Spain only once, precisely one hundred years ago. The circumstances, of a very different kind, of this visit will be explained here. In special, some important events happened to Einstein during that period, which, eventually, were key for converting modern cosmology into a genuine physical theory. Among them is the famous Einstein-Friedmann controversy, first, on the mathematical validity of Friedmann’s equations and, later, their possible usefulness as a reliable tool to describe the real world. A summary of the deepest ideas underlying Einstein’s contributions to the theory of relativity, which he had already completed before his visit, will precede the discussion, also supplemented with a description, in very simple terms, of the three main relativistic theories, namely Galileo’s one, and Einstein’s special and general theory. They pave the way towards a definitive theory of total relativity, so far unattainable. It will be recalled that the most general relativity principle, faithfully reflecting Ernst Mach’s far-reaching ideas, might have much to do with the symmetry-breaking paradigm, a most crucial tool in quantum field theory and high energy physics.

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Hans Christian Öttinger

Thu Sep 07 2023 10:16:19 (1 day)

# 11.

The stochastic nature of quantum mechanics is more naturally reflected in a bilinear two-process representation of density matrices rather than in squared wave functions. This proposition comes with a remarkable change of the entanglement mechanism: entanglement does not originate from superpositions of wave functions, but results from the bilinear structure of density matrices. Quantum interference is not an additive superposition mechanism, but rather a multiplicative phenomenon. The proposed bilinear representation of density matrices is given in terms of two stochastic jump processes. These ideas are illustrated for the Einstein-Podolsky-Rosen and double-slit experiments. The expression of the stochastic nature of quantum mechanics in terms of random variables rather than their probability distributions facilitates an ontological viewpoint and leads us to a two-worlds interpretation of quantum mechanics.

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Emily Adlam

Thu Sep 07 2023 10:16:18 (1 day)

# 12.

Recently there have emerged an assortment of theorems relating to the ‘absoluteness of emerged events,’ and these results have sometimes been used to argue that quantum mechanics may involve some kind of metaphysically radical non-absoluteness, such as relationalism or perspectivalism. However, in our view a close examination of these theorems fails to convincingly support such possibilities. In this paper we argue that the Wigner’s friend paradox, the theorem of Bong et al and the theorem of Lawrence et al are all best understood as demonstrating that if quantum mechanics is universal, and if certain auxiliary assumptions hold, then the world inevitably includes various forms of ‘disaccord,’ but this need not be interpreted in a metaphysically radical way; meanwhile, the theorem of Ormrod and Barrett is best understood either as an argument for an interpretation allowing multiple outcomes per observer, such as the Everett approach, or as a proof that quantum mechanics cannot be universal in the sense relevant for this theorem. We also argue that these theorems taken together suggest interesting possibilities for a different kind of relational approach in which dynamical states are relativized whilst observed events are absolute, and we show that although something like ‘retrocausality’ might be needed to make such an approach work, this would be a very special kind of retrocausality which would evade a number of common objections against retrocausality. We conclude that the non-absoluteness theorems may have a significant role to play in helping converge towards an acceptable solution to the measurement problem.

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Thu Sep 07 2023 04:49:19 (2 days)

# 13.

Kearney, Peter (2020) Decoherence, the measurement problem and realism. [Preprint]

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Thu Sep 07 2023 04:46:35 (2 days)

# 14.

Barandes, Jacob A. (2023) The Stochastic-Quantum Theorem. [Preprint]

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Thu Sep 07 2023 04:37:32 (2 days)

# 15.

Kastner, Ruth and Schlatter, Andreas (2023) Entropy cost of “Erasure” in Physically Irreversible Processes. [Preprint]

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Davide Poderini, Giovanni Rodari, George Moreno, Emanuele Polino, Ranieri Nery, Alessia Suprano, Cristhiano Duarte, Fabio Sciarrino, and Rafael Chaves

Tue Sep 05 2023 18:00:00 (3 days)

# 16.

Author(s): Davide Poderini, Giovanni Rodari, George Moreno, Emanuele Polino, Ranieri Nery, Alessia Suprano, Cristhiano Duarte, Fabio Sciarrino, and Rafael Chaves

Quantum Darwinism offers an explanation for the emergence of classical objective features (those we are used to at macroscopic scales) from quantum properties at the microscopic level. The interaction of a quantum system with its surroundings redundantly proliferates information to many parts of the…

[Phys. Rev. A 108, 032201] Published Tue Sep 05, 2023

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Tue Sep 05 2023 06:48:07 (4 days)

# 17.

Barandes, Jacob A. (2023) The Stochastic-Quantum Correspondence. [Preprint]

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Tue Sep 05 2023 06:42:53 (4 days)

# 18.

Fraser, James D. (2023) Infinite Scale Scepticism: Probing the Epistemology of the Limit of Infinite Degrees of Freedom and Hilbert Space Non-Uniqueness. [Preprint]

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Tue Sep 05 2023 05:00:22 (4 days)

# 19.

Krause, Décio (2023) The underlying logic is mandatory also in discussing the philosophy of quantum physics. [Preprint]

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Sun Sep 03 2023 11:36:34 (5 days)

# 20.

Giovanelli, Marco (2023) Cassirer and Energetics: An Investigation of Cassirer’s Early Philosophy of Physics. British Journal for the History of Philosophy. ISSN 1469-3526

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Sun Sep 03 2023 11:34:35 (5 days)

# 21.

Giovanelli, Marco (2023) Relativity Theory as a Theory of Principles. A Reading of Cassirer’s Zur Einstein’schen Relativitätstheorie. [Preprint]

quant-ph>arXiv:2308.11262

Superdeterminism Without Conspiracy

Superdeterminism — where the Measurement-Independence assumption in Bell’s Theorem is violated — is typically treated with derision as it appears to imply contrived conspiratorial correlations between properties λ of particles being measured, and nominally accurate measurement settings x and y. Based on an analysis of Pearlean interventions needed to determine whether x and y are free variables, we show that whilst conspiracy implies superdeterminism, superdeterminism does not imply conspiracy. In conspiratorial superdeterminism these interventions are consistent with physical theory; in non-conspiratorial superdeterminism they are inconsistent. A non-conspiratorial locally-causal superdeterministic model is developed, based in part on the generic properties of chaotic attractors and in part on an arbitrarily fine discretisation of complex Hilbert Space. Here the required interventions are inconsistent with rational-number constraints on exact measurement settings X and Y. In this model, hidden variables λ are defined as the information, over and above the freely chosen determinants of x and y, which determine X and Y. These rationality constraints limit the freedom to vary x and y keeping λ fixed. These constraints disappear with any coarse-graining of λ and hence X. We show how quantum mechanics might be `gloriously explained and derived’ as the singular continuum limit of a superdeterministic discretisation of Hilbert Space. We argue that the real message behind Bell’s Theorem is the need to develop more holistic theories of fundamental physics — notably gravitational physics — some ideas for moving in this direction are discussed.

]]>Cosmological Inflation and Meta-Empirical Theory Assessment |

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Fri Sep 01 2023 19:17:45 (17 hours)

# 1.

Wolf, William J. (2023) Cosmological Inflation and Meta-Empirical Theory Assessment. [Preprint]

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Raoni Arroyo, Jonas R. B. Arenhart, Décio Krause

Fri Sep 01 2023 09:34:23 (1 day)

# 2.

This chapter argues that the general philosophy of science should learn metaphilosophical lessons from the case of metaphysical underdetermination, as it occurs in non-relativistic quantum mechanics. Section 2 presents the traditional discussion of metaphysical underdetermination regarding the individuality and non-individuality of quantum particles. Section 3 discusses three reactions to it found in the literature: eliminativism about individuality; conservatism about individuality; eliminativism about objects. Section 4 wraps it all up with metametaphysical considerations regarding the epistemology of metaphysics of science.

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David Schmid, Yìlè Yīng, Matthew Leifer

Fri Sep 01 2023 09:34:20 (1 day)

# 3.

The Wigner’s friend thought experiment was intended to illustrate the difficulty one has in describing an agent as a quantum system when that agent performs a measurement. While it does pose a challenge to the orthodox interpretation of quantum theory, most modern interpretations have no trouble in resolving the difficulty. Recently, a number of extensions of Wigner’s ideas have been proposed. We provide a gentle introduction to six such arguments, modifying the specifics of many of them so that they are as simple and unified as possible. In particular, we show that all of the arguments hinge on assumptions about correlations between measurement outcomes that are not accessible to any observer, even in principle. We then provide a critical analysis of each argument, focusing especially on how well one can motivate the required assumptions regarding these inaccessible correlations. Although we argue that some of these assumptions are not entirely well-motivated, all of the arguments do shed light on the nature of quantum theory, especially when concerning the description of agents and their measurements. Although there are other possible responses, the most compelling of these no-go theorems can be taken to support the view that measurement outcomes are perspectival rather than absolute.

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Alan H. Guth, Mohammad Hossein Namjoo

Fri Sep 01 2023 09:34:19 (1 day)

# 4.

The two statistical methods, namely the frequentist and the Bayesian methods, are both commonly used for probabilistic inference in many scientific situations. However, it is not straightforward to interpret the result of one approach in terms of the concepts of the other. In this paper we explore the possibility of finding a Bayesian significance for the frequentist’s main object of interest, the $p$-value, which is the probability assigned to the proposition — which we call the {\it extremity proposition} — that a measurement will result in a value that is at least as extreme as the value that was actually obtained. To make contact with the frequentist language, the Bayesian can choose to update probabilities based on the {\it extremity proposition}, which is weaker than the standard Bayesian update proposition, which uses the actual observed value. We then show that the posterior probability (or probability density) of a theory is equal to the prior probability (or probability density) multiplied by the ratio of the $p$-value for the data obtained, given that theory, to the mean $p$-value — averaged over all theories weighted by their prior probabilities. Thus, we provide frequentist answers to Bayesian questions. Our result is generic — it does not rely on restrictive assumptions about the situation under consideration or specific properties of the likelihoods or the priors.

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Antoine Soulas

Fri Sep 01 2023 09:34:19 (1 day)

# 5.

Endeavoring to formulate an exhaustive solution to the measurement problem in view of the theory of decoherence leads to a better understanding of the status of the collapse and of the emergence of classicality, thanks to a precise definition of the measurement and some new vocabulary to speak about quantum mechanics. Considering the latter as a probabilistic theory all along allows us to avoid the usual probability problem of the many-worlds interpretations. A thorough verification of the consistency of quantum mechanics at all scales is proposed, as well as a discussion of what can be deemed an observer.

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Inge S. Helland

Fri Sep 01 2023 09:34:18 (1 day)

# 6.

An alternative approach towards quantum theory is described, and tentative attempts to connect his approach to special and general relativity are discussed. Important concepts are gauge groups and information/entropy connected to some physical systems. Some recent results on information in connection to black holes are touched upon.

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Carlo Branchina, Vincenzo Branchina, Filippo Contino, Arcangelo Pernace

Fri Sep 01 2023 09:34:11 (1 day)

# 7.

It has been recently proposed that we might live in a universe with a single compact extra dimension, whose mesoscopic size is dictated by the measured value of the cosmological constant. Central to this proposal is the result that in a $4+n$ dimensional theory with $n$ compact dimensions a tower of Kaluza-Klein (KK) states contributes an amount $m_{_{\rm KK}}^4$ to the vacuum energy $\rho_4$, where $m_{_{\rm KK}}$ is the KK scale of the tower. We show that the result $\rho_4 \sim m_{_{\rm KK}}^4$ comes from a mistreatment of the asymptotics of the loop momenta in the $4+n$ original theory. When the latter are correctly treated, new UV-sensitive terms appear in $\rho_4$ that invalidate the prediction of the dark dimension. We also show that, despite recent claims to the contrary, it is always possible to perform consistent effective field theory calculations that include only a finite number of tower states.

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Sunny Vagnozzi

Fri Sep 01 2023 09:34:07 (1 day)

# 8.

The Hubble tension has now grown to a level of significance which can no longer be ignored and calls for a solution which, despite a huge number of attempts, has so far eluded us. Significant efforts in the literature have focused on early-time modifications of $\Lambda$CDM, introducing new physics operating prior to recombination and reducing the sound horizon. In this opinion paper I argue that early-time new physics alone will always fall short of fully solving the Hubble tension. I base my arguments on seven independent hints, related to 1) the ages of the oldest astrophysical objects, 2) considerations on the sound horizon-Hubble constant degeneracy directions in cosmological data, 3) the important role of cosmic chronometers, 4) a number of “descending trends” observed in a wide variety of low-redshift datasets, 5) the early integrated Sachs-Wolfe effect as an early-time consistency test of $\Lambda$CDM, 6) early-Universe physics insensitive and uncalibrated cosmic standard constraints on the matter density, and finally 7) equality wavenumber-based constraints on the Hubble constant from galaxy power spectrum measurements. I argue that a promising way forward should ultimately involve a combination of early- and late-time (but non-local — in a cosmological sense, i.e. at high redshift) new physics, as well as local (i.e. at $z \sim 0$) new physics, and I conclude by providing reflections with regards to potentially interesting models which may also help with the $S_8$ tension.

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Fri Sep 01 2023 04:06:44 (1 day)

# 9.

Rivat, Sébastien (2023) Wait, Why Gauge? [Preprint]

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Fri Sep 01 2023 04:04:06 (1 day)

# 10.

Cuffaro, Michael E. (2023) The Measurement Problem Is a Feature, Not a Bug – Schematising the Observer as a Postulate and the Quantum-Mechanical Concept of an Open System on an Informational, or (neo-)Bohrian, Approach. [Preprint]

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Fri Sep 01 2023 03:56:56 (1 day)

# 11.

Miller, Ryan (2023) Chemical Reduction and Quantum Interpretation: A Case for Thomistic Emergence. Foundations of Chemistry. ISSN 1386-4238

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Gary T. Horowitz, Maciej Kolanowski, Grant N. Remmen, and Jorge E. Santos

Thu Aug 31 2023 18:00:00 (1 day)

# 12.

Author(s): Gary T. Horowitz, Maciej Kolanowski, Grant N. Remmen, and Jorge E. Santos

A theoretical analysis suggests that certain rotating black holes might be sensitive probes of quantum gravity.

[Phys. Rev. Lett. 131, 091402] Published Thu Aug 31, 2023

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Wed Aug 30 2023 19:47:27 (2 days)

# 13.

Rubin, Mark (2023) The replication crisis is less of a “crisis” in the Lakatosian approach than it is in the Popperian and naïve methodological falsificationism approaches. [Preprint]

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Wed Aug 30 2023 19:41:11 (2 days)

# 14.

Rickles, Dean and Elshatlawy, Hatem and Arsiwalla, Xerxes (2023) Ruliology: Linking Computation, Observers and Physical Law. [Preprint]

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David J. Tannor

Wed Aug 30 2023 12:04:05 (3 days)

# 15.

In 1834-1835, Hamilton published two papers that revolutionized classical mechanics. In these papers, he introduced the Hamilton-Jacobi equation, Hamilton’s equations of motion and the principle of least action. These three formulations of classical mechanics became the forerunners of quantum mechanics, but none of these is what Hamilton was looking for: he was looking for what he called the principal function, $S(q’,q”,T)$, from which the entire trajectory history can be obtained just by differentiation. Here we show that all of Hamilton’s formulations can be derived just by assuming that the principal function is additive, $S(q’,q”,T)=S(q’,Q,t_1)+S(Q,q”,t_2)$ with $t_1+t_2=T$. This simple additivity axiom can be considered the fundamental principle of classical mechanics and shows that analytical mechanics is essentially just a footnote to the problem of finding the shortest path between two points. The simplicity of the formulation could provide new perspectives on some of the major themes in classical mechanics including symplectic geometry, periodic orbit theory and Morse theory, as well as giving new perspectives on quantum mechanics. Moreover, it could potentially provide a unified description of different areas of physics, leading to insight for example, into the transition from deterministic dynamics to statistical mechanics.

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Wed Aug 30 2023 07:01:26 (3 days)

# 16.

Coko, Klodian (2023) Controlling the Invisible: Experimental Strategies and Hypotheses in Discovering the Cause of Brownian Movement. [Preprint]

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Tue Aug 29 2023 02:05:03 (4 days)

# 17.

Stoica, Ovidiu Cristinel (2023) Asking physics about physicalism, zombies, and consciousness. [Preprint]

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Tue Aug 29 2023 02:02:28 (4 days)

# 18.

Struyve, Ward (2023) Scope of the action principle. [Preprint]

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Daniel Linford

Mon Aug 28 2023 10:00:52 (5 days)

# 19.

Intuitively, the totality of physical reality — the Cosmos — has a beginning only if (i) all parts of the Cosmos agree on the direction of time (the Direction Condition) and (ii) there is a boundary to the past of all non-initial spacetime points such that there are no spacetime points to the past of the boundary (the Boundary Condition). Following a distinction previously introduced by J. Brian Pitts, the Boundary Condition can be conceived of in two distinct ways: either topologically, i.e., in terms of a closed boundary, or metrically, i.e., in terms of the Cosmos having a finite past. This article proposes that the Boundary Condition should be posed disjunctively, modifies and improves upon the metrical conception of the Cosmos’s beginning in light of a series of surprising yet simple thought experiments, and suggests that the Direction and Boundary Conditions should be thought of as more fundamental to the concept of the Cosmos’s beginning than classical Big Bang cosmology.

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Mon Aug 28 2023 04:26:05 (5 days)

# 20.

March, Eleanor (2023) Are Maxwell gravitation and Newton-Cartan theory theoretically equivalent? [Preprint]

]]>Distinguishing two (unsound) arguments for quantum social science |

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Sat Aug 26 2023 02:03:44 (8 hours)

# 1.

Jaksland, Rasmus (2023) Distinguishing two (unsound) arguments for quantum social science. European Journal for Philosophy of Science. ISSN 1879-4912

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Moisés Bermejo Morán, Alejandro Pozas-Kerstjens, and Felix Huber

Fri Aug 25 2023 18:00:00 (16 hours)

# 2.

Author(s): Moisés Bermejo Morán, Alejandro Pozas-Kerstjens, and Felix Huber

Which nonlocal correlations can be obtained, when a party has access to more than one subsystem? While traditionally nonlocality deals with spacelike separated parties, this question becomes important with quantum technologies that connect devices by means of small shared systems. Here, we study Bel…

[Phys. Rev. Lett. 131, 080201] Published Fri Aug 25, 2023

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Arkady Bolotin

Fri Aug 25 2023 10:07:14 (1 day)

# 3.

Conventional wisdom holds that any region of 3-space contains infinitely many points, and the Planck length scale determines the uncertainty in every measurement of distance between two separate points. Against such a backdrop, this uncertainty may be interpreted as resulting from either foaminess or discreteness of 3-space. But, as it is demonstrated in the present paper, neither of those interpretations is consistent with the holographic principle. In the paper it is shown that the statement “The holographic principle holds true” and the statement “Each region in 3-space contains only a finite number of points” are logically equivalent.

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Igor Salom

Fri Aug 25 2023 10:07:14 (1 day)

# 4.

The ideas and results that are in the background of the 2022 Nobel Prize in physics had an immense impact on our understanding of reality. Therefore, it is crucial that these implications reach also the general public, not only the scientists in the related fields of quantum mechanics. The purpose of this review is to attempt to elucidate these revolutionary changes in our worldview that were eventually acknowledged also by the Nobel’s committee, and to do it with very few references to mathematical details (which could be even ignored without undermining the take-away essence of the text).

We first look into the foundational disputes between Einstein and Bohr about the nature of quantum mechanics, which culminated in the so-called EPR paradox — the main impetus for all the research that would ensue in this context. Next, we try to explain the statement of the famous Bell’s theorem — the theorem that relocated the Einstain-Bohr discussions from the realm of philosophy and metaphysics to hard-core physics verifiable by experiments (we also give a brief derivation of the theorem’s proof). Then we overview the experimental work of the last year’s laureates, that had the final say about who was right in the debate. The outcome of these experiments forced us to profoundly revise our understanding of the universe. Finally, we discuss in more detail the implications of such outcomes, and what are the possible ways that our worldviews can be modified to account for the experimental facts. As we will see, the standard mechanist picture of the universe is no longer a viable option, and can be never again. Nowadays, we know this with certainty unusual for physics, that only a strict mathematical theorem could provide.

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Salvador D. Escobedo

Fri Aug 25 2023 10:07:12 (1 day)

# 5.

Both relativistic mechanics and Newtonian mechanics are based on principles that have ontological implications. We propose a series of formalisms that rigorously define the ontology underlying mechanical theories, in order to clarify and formally establish the ontology of the physics of motion. Special attention has been paid to relativistic theories. Through the proposed methodology, the concept of ontological consistency is developed and the conditions required for such consistency to be satisfied in any theory are established. In particular, the consistency test is performed for Newtonian mechanics, special relativity theory, and general relativity theory.

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J. B. Formiga, João Duarte

Fri Aug 25 2023 10:06:57 (1 day)

# 6.

The lack of a well-established solution for the gravitational energy problem might be one of the reasons why a clear road to quantum gravity does not exist. In this paper, the gravitational energy is studied in detail with the help of the teleparallel approach that is equivalent to general relativity. This approach is applied to the solutions of the Einstein-Maxwell equations known as $pp$-wave spacetimes. The quantization of the electromagnetic energy is assumed and it is shown that the proper area measured by an observer must satisfy an equation for consistency. The meaning of this equation is discussed and it is argued that the spacetime geometry should become discrete once all matter fields are quantized, including the constituents of the frame; it is shown that for a harmonic oscillation with wavelength $\lambda_0$, the area and the volume take the form $A=4(N+1/2)l_p^2/n$ and $V=2(N+1/2)l_p^2\lambda_0$, where $N$ is the number of photons, $l_p$ the Planck length, and $n$ is a natural number associated with the length along the $z$-axis of a box with cross-sectional area $A$. The localization of the gravitational energy problem is also discussed. The stress-energy tensors for the gravitational and electromagnetic fields are decomposed into energy density, pressures and heat flow. The resultant expressions are consistent with the properties of the fields, thus indicating that one can have a well-defined energy density for the gravitational field regardless of the principle of equivalence.

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Fri Aug 25 2023 02:02:13 (1 day)

# 7.

Wenmackers, Sylvia (2023) Uniform probability in cosmology. [Preprint]

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Sylvia Wenmackers

Thu Aug 24 2023 10:40:43 (1 day)

# 8.

Problems with uniform probabilities on an infinite support show up in contemporary cosmology. This paper focuses on the context of inflation theory, where it complicates the assignment of a probability measure over pocket universes. The measure problem in cosmology, whereby it seems impossible to pick out a uniquely well-motivated measure, is associated with a paradox that occurs in standard probability theory and crucially involves uniformity on an infinite sample space. This problem has been discussed by physicists, albeit without reference to earlier work on this topic. The aim of this article is both to introduce philosophers of probability to these recent discussions in cosmology and to familiarize physicists and philosophers working on cosmology with relevant foundational work by Kolmogorov, de Finetti, Jaynes, and other probabilists. As such, the main goal is not to solve the measure problem, but to clarify the exact origin of some of the current obstacles. The analysis of the assumptions going into the paradox indicates that there exist multiple ways of dealing consistently with uniform probabilities on infinite sample spaces. Taking a pluralist stance towards the mathematical methods used in cosmology shows there is some room for progress with assigning probabilities in cosmological theories.

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Hanoch Ben-Yami

Thu Aug 24 2023 10:40:42 (1 day)

# 9.

I explain in what sense the structure of space and time is probably vague or indefinite, a notion I define. This leads to the mathematical representation of location in space and time by a vague interval. From this, a principle of complementary inaccuracy between spatial location and velocity is derived, and its relation to the Uncertainty Principle discussed. In addition, even if the laws of nature are deterministic, the behaviour of systems will be random to some degree. These and other considerations draw classical physics closer to Quantum Mechanics. An arrow of entropy is also derived, given an arrow of time. Lastly, chaos is given an additional, objective meaning.

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Jonte R. Hance, Sabine Hossenfelder

Wed Aug 23 2023 09:48:08 (3 days)

# 10.

In a recent paper (Phys. Rev. A 105, 042220 (2022)), Daley et al claim that superdeterministic models are disfavoured against standard quantum mechanics, because such models overfit the statistics of a Bell-type experiment which the authors conducted. We argue here that their claim is based on a misunderstanding of what superdeterministic models are.

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Wed Aug 23 2023 00:39:51 (3 days)

# 11.

Hazelwood, Caleb (2023) Newton’s “Law-First” Epistemology and “Matter-First” Metaphysics. [Preprint]

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Jonte R. Hance, James Ladyman, John Rarity

Tue Aug 22 2023 11:02:56 (3 days)

# 12.

We explore how one might detect the dynamical quantum Cheshire cat proposed by Aharonov et al. We show that, in practice, we need to bias the initial state by adding/subtracting a small probability amplitude (`field’) of the orthogonal state, which travels with the disembodied property, to make the effect detectable (i.e. if our initial state is $|\uparrow_z\rangle$, we need to bias this with some small amount $\delta$ of state $|\downarrow_z\rangle$). This biasing, which can be done either directly or via weakly entangling the state with a pointer, effectively provides a phase reference with which we can measure the evolution of the state. The outcome can then be measured as a small probability difference in detections in a mutually unbiased basis, proportional to this biasing $\delta$. We show this is different from counterfactual communication, which provably does not require any probe field to travel between sender Bob and receiver Alice for communication. We further suggest an optical polarisation experiment where these phenomena might be demonstrated in a laboratory.

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Tue Aug 22 2023 00:44:31 (4 days)

# 13.

Chen, Elliott D. (2023) Newtonian Gravitation in Maxwell Spacetime. [Preprint]

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Partha Ghose

Mon Aug 21 2023 11:28:54 (4 days)

# 14.

As we approach the centenary of the discovery of quantum statistics in 1924, it is important to revisit Bose’s original derivation of Planck’s law usually ignored in most standard presentations of Bose-Einstein statistics. It introduced not only the novel concept of the indistinguishability of photons but also of their intrinsic spin, a fact unknown to most physicists.

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Mon Aug 21 2023 07:46:50 (5 days)

# 15.

Krause, Décio (2023) The underlying logic is mandatory also in discussing the philosophy of quantum physics. [Preprint]

]]>The Model View Meets Quantum Ontology |

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Sat Aug 19 2023 00:49:47 (8 hours)

# 1.

Walstad, Allan (2023) The Model View Meets Quantum Ontology. UNSPECIFIED.

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Fri Aug 18 2023 01:20:30 (1 day)

# 2.

Suárez, Mauricio and Sánchez-Gómez, Pedro J. (2023) Chemical Reactivity: The Propensity View. [Preprint]

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Fri Aug 18 2023 01:19:05 (1 day)

# 3.

March, Eleanor (2023) Are Maxwell gravitation and Newton-Cartan theory theoretically equivalent? [Preprint]

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Fri Aug 18 2023 01:18:09 (1 day)

# 4.

Childers, Konner (2023) Duality and Categorical Equivalence: A Look at Gauge/Gravity. [Preprint]

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A. Hayashi

Thu Aug 17 2023 18:00:00 (1 day)

# 5.

Author(s): A. Hayashi

The Aharonov-Bohm (AB) phase is usually associated with a line integral of the electromagnetic vector potential generated by an external current source, such as a solenoid. According to this interpretation, the AB phase of a nonclosed path cannot be observed, as the integral depends on the gauge cho…

[Phys. Rev. A 108, 022212] Published Thu Aug 17, 2023

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Thu Aug 17 2023 02:08:41 (2 days)

# 6.

Miller, Ryan (2023) Chemical Reduction and Quantum Interpretation: A Case for Thomistic Emergence. [Preprint]

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Wed Aug 16 2023 02:05:29 (3 days)

# 7.

Middleton, Ben and Murgueitio Ramírez, Sebastián (2022) Absolute velocities are measurable: Response to Jacobs. [Preprint]

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Wed Aug 16 2023 02:01:34 (3 days)

# 8.

Wolf, William J. and Read, James (2023) The Non-Relativistic Geometric Trinity of Gravity. [Preprint]

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Tue Aug 15 2023 01:18:52 (4 days)

# 9.

Linford, Daniel (2023) On the Boundary of the Cosmos. Foundations of Physics, 53 (76). ISSN 0015-9018

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Dominik Šafránek and Dario Rosa

Mon Aug 14 2023 18:00:00 (4 days)

# 10.

Author(s): Dominik Šafránek and Dario Rosa

We present a method to estimate the probabilities of outcomes of a quantum observable, its mean value, and higher moments by measuring any other observable. This method is general and can be applied to any quantum system. In the case of estimating the mean energy of an isolated system, the estimate …

[Phys. Rev. A 108, 022208] Published Mon Aug 14, 2023

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Mon Aug 14 2023 02:14:24 (5 days)

# 11.

March, Eleanor (2023) Is the Deutsch-Wallace theorem redundant? [Preprint]

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Mon Aug 14 2023 02:13:44 (5 days)

# 12.

March, Eleanor (2023) Maxwell gravitation without reference to equivalence classes of derivative operators. [Preprint]

]]>