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Aminur Rahman
Fri May 03 2024 10:51:22 (1 day)
# 1.
arXiv:2405.00707v1 Announce Type: new Abstract: Experiments violating Bell’s inequality appear to indicate deterministic models do not correspond to a realistic theory of quantum mechanics. The theory of pilot waves seemingly overcomes this hurdle via nonlocality and statistical dependence, however it necessitates the existence of “ghost waves”. This manuscript develops a deterministic dynamical system with local interactions. The aggregate behavior of the trajectories are reminiscent of a quantum particle evolving under the Schr\”{o}dinger equation and reminiscent of Feynman’s path integral interpretation in three canonical examples: motion in free space, double slit diffraction, and superluminal barrier traversal. Moreover, the system bifurcates into various dynamical regimes including a classical limit. These results illustrate a deterministic alternative to probabilistic interpretations and aims to shed light on the transition from quantum to classical mechanics.
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Eddy Keming Chen
Fri May 03 2024 10:51:21 (1 day)
# 2.
arXiv:2405.01025v1 Announce Type: cross Abstract: Realism about quantum theory naturally leads to realism about the quantum state of the universe. It leaves open whether it is a pure state represented by a wave function, or an impure one represented by a density matrix. I characterize and elaborate on Density Matrix Realism, the thesis that the universal quantum state is objective but can be impure. To clarify the thesis, I compare it with Wave Function Realism, explain the conditions under which they are empirically equivalent, consider two generalizations of Density Matrix Realism, and answer some frequently asked questions. I end by highlighting an implication for scientific realism.
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Xerxes D. Arsiwalla
Fri May 03 2024 10:51:20 (1 day)
# 3.
arXiv:2405.01148v1 Announce Type: cross Abstract: This work explores the hypothesis that subjectively attributed meaning constitutes the phenomenal content of conscious experience. That is, phenomenal content is semantic. This form of subjective meaning manifests as an intrinsic and non-representational character of qualia. Empirically, subjective meaning is ubiquitous in conscious experiences. We point to phenomenological studies that lend evidence to support this. Furthermore, this notion of meaning closely relates to what Frege refers to as “sense”, in metaphysics and philosophy of language. It also aligns with Peirce’s “interpretant”, in semiotics. We discuss how Frege’s sense can also be extended to the raw feels of consciousness. Sense and reference both play a role in phenomenal experience. Moreover, within the context of the mind-matter relation, we provide a formalization of subjective meaning associated to one’s mental representations. Identifying the precise maps between the physical and mental domains, we argue that syntactic and semantic structures transcend language, and are realized within each of these domains. Formally, meaning is a relational attribute, realized via a map that interprets syntactic structures of a formal system within an appropriate semantic space. The image of this map within the mental domain is what is relevant for experience, and thus comprises the phenomenal content of qualia. We conclude with possible implications this may have for experience-based theories of consciousness.
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Lee A. Rozema, Teodor Str\”omberg, Huan Cao, Yu Guo, Bi-Heng Liu, Philip Walther
Fri May 03 2024 10:51:20 (1 day)
# 4.
arXiv:2405.00767v1 Announce Type: new Abstract: In the past decade, the toolkit of quantum information has been expanded to include processes in which the basic operations do not have definite causal relations. Originally considered in the context of the unification of quantum mechanics and general relativity, these causally indefinite processes have been shown to offer advantages in a wide variety of quantum information processing tasks, ranging from quantum computation to quantum metrology. Here we overview these advantages and the experimental efforts to realise them. We survey both the different experimental techniques employed, as well as theoretical methods developed in support of the experiments, before discussing the interpretations of current experimental results and giving an outlook on the future of the field.
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Leila Maghlaoui, Peter O. Hess
Fri May 03 2024 10:51:13 (1 day)
# 5.
arXiv:2405.01325v1 Announce Type: new Abstract: A brief review of the pseudo complex General Relativity (pcGR) will be presented, with its consequences, as the accumulation of a dark energy around a mass and a generalized Machs principle. The main objective in this contribution is to determine the Hawking temperature and the Entropy for various limits: i) The pc-Schwarzschild case with no minimal length present, ii) the pc-Kerr metric without a minimal length and iii) the general case, the pc-Kerr metric with a minimal length present. The physical consequences of a minimal length will be discussed, a possible interpretation of a gravitational Schwinger effect and the appearance of negative temperature. For large masses a minimal length does not show any sensible effect, but only for very small masses, several orders of the Planck mass, where non-trivial effects emerge, important for the production of mini-black holes in the early universe. Our results are more general than being restricted to pcGR. Any other model which assumes a distribution of dark energy around a stellar body produces the same effects. In contrast to these models, pcGR demands the presence of a dark energy term.
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Marco de Cesare
Fri May 03 2024 10:51:10 (1 day)
# 6.
arXiv:2405.01380v1 Announce Type: new Abstract: Different approaches to quantum gravity, such as loop quantum cosmology and group field theory, predict the resolution of the initial cosmological singularity via a ‘bounce’: a regular spacetime region that connects the expanding branch of the universe to a contracting branch. The cosmological arrow of time, which by definition points in the direction of cosmic expansion, is reversed at the bounce. Nonetheless, it is still possible to discriminate between the two branches by considering different arrows, as defined for instance by the growth of perturbations. After reviewing general aspects of the time arrow problem in cosmology, we examine the properties of different arrows of time in bouncing cosmologies, focusing on the loop quantum cosmology bounce as a case study. We also present a new exact solution to the effective Friedmann equations of loop quantum cosmology with pressureless dust and a cosmological constant, which is a simplified version of the $\Lambda$CDM bounce scenario, where these issues can be examined in detail.
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Eric Lantz, Fabrice Devaux, Serge Massar
Fri May 03 2024 10:51:04 (1 day)
# 7.
arXiv:2405.01050v1 Announce Type: new Abstract: Subtracting accidental coincidences is a common practice quantum optics experiments. For zero mean Gaussian states, such as squeezed vacuum, we show that if one removes accidental coincidences the measurement results are quantitatively the same, both for photon coincidences at very low flux and for intensity covariances. Consequently, pure quantum effects at the photon level, like interference of photon wave functions or photon bunching, are reproduced in the correlation of fluctuations of macroscopic beams issued from spontaneous down conversion. This is true both in experiment if the detection resolution is smaller than the coherence cell (size of the mode), and in stochastic simulations based on sampling the Wigner function. We discuss the limitations of this correspondence, such as Bell inequalities (for which one cannot substract accidental coincidences), highly multimode situations such as quantum imaging, and higher order correlations.
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Tae-Hun Lee and Jarosław K. Korbicz
Fri May 03 2024 06:00:00 (1 day)
# 8.
Author(s): Tae-Hun Lee and Jarosław K. Korbicz
We investigate quantum objectivity in the boson-spin model, where a central harmonic oscillator interacts with a thermal bath of spin-12 systems. We analyze how information about a continuous position variable can be encoded into discrete, finite-dimensional environments. More precisely, we study co…
[Phys. Rev. A 109, 052204] Published Fri May 03, 2024
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Thu May 02 2024 20:00:00 (1 day)
# 9.
Nature Physics, Published online: 03 May 2024; doi:10.1038/s41567-024-02463-7The Q-value of electron capture in 163Ho has been determined with an uncertainty of 0.6 eV c–2 through a combination of high-precision Penning-trap mass spectrometry and precise atomic physics calculations. This high-precision measurement provides insight into systematic errors in neutrino mass measurements.
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D V Red\v{z}i\’c
Wed May 01 2024 09:45:05 (3 days)
# 10.
arXiv:2404.19566v1 Announce Type: cross Abstract: The complex relationship between Einstein’s second postulate and the Maxwell electromagnetic theory is elucidated. A simple deduction of the main results of the Ignatowski approach to the theory of relativity is given. The peculiar status of the principle of relativity among the Maxwellians is illustrated.
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Barak Shoshany, Zipora Stober
Tue Apr 30 2024 09:57:31 (4 days)
# 11.
arXiv:2303.07635v3 Announce Type: replace-cross Abstract: For time travel to be consistent with the known laws of physics, the resulting paradoxes must be resolved. It has been suggested that parallel timelines (a.k.a. multiple histories) may provide a resolution. However, so far, a concrete mechanism by which parallel timelines can be created has never been satisfactorily formulated. In this paper we propose such a mechanism within the framework of unmodified quantum mechanics, also known as the Everett or “many-worlds” interpretation. The timelines in our model are emergent, like the “worlds” of the Everett interpretation; they are created by quantum entanglement between the time machine and the environment. Therefore, we call them “entangled timelines” or E-CTCs. As the entanglement gradually spreads out to additional systems, the timelines spread out as well, providing a local and well-defined alternative to the naive “branching timelines” picture often presented in the literature. The E-CTC model is similar to Deutsch’s familiar D-CTC model, but differs from it mainly by making the entanglement explicit, which allows us to create a clearer practical definition of the resulting parallel timelines.
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Hans Christian \”Ottinger
Tue Apr 30 2024 09:57:30 (4 days)
# 12.
arXiv:2309.03151v2 Announce Type: replace-cross Abstract: 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 effects do not originate from superpositions of wave functions, but result from the bilinear structure of density matrices. Quantum interference appears as a multiplicative phenomenon rather than an additive superposition mechanism. We propose two general requirements such that the bilinear representation of density matrices is given in terms of two uniquely defined, identically distributed, Markovian stochastic jump processes. These general 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 bra-ket interpretation of quantum mechanics.
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Tue Apr 30 2024 08:47:40 (4 days)
# 13.
Elohim, David (2014) Physical Necessitism. [Preprint]
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Tue Apr 30 2024 08:46:36 (4 days)
# 14.
François, Jordan and Berghofer, Philipp (2024) Dressing vs. Fixing: On How to Extract and Interpret Gauge-Invariant Content. [Preprint]
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Tue Apr 30 2024 08:44:37 (4 days)
# 15.
Chen, Eddy Keming (2022) Strong Determinism. [Preprint]
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Jordan Fran\c{c}ois, Lucrezia Ravera
Mon Apr 29 2024 10:20:33 (5 days)
# 16.
arXiv:2404.17449v1 Announce Type: new Abstract: We propose our account of the meaning of local symmetries. We argue that the general covariance principle and gauge principle both are principles of democratic epistemic access to the law of physics, leading to ontological insights about the objective nature of spacetime. We further argue that relationality is a core notion of general-relativistic gauge field theory, tacitly encoded by its (active) local symmetries.
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Mon Apr 29 2024 09:53:45 (5 days)
# 17.
Shanahan, Daniel (2024) The de Broglie wave as an undulatory distortion induced in the moving particle by the failure of simultaneity. [Preprint]
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Mon Apr 29 2024 09:48:36 (5 days)
# 18.
François, Jordan and Ravera, Lucrezia (2024) On the Meaning of Local Symmetries: Epistemic-Ontological Dialectics. [Preprint]
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Isaac Friend and Aleks Kissinger
Mon Apr 29 2024 06:00:00 (5 days)
# 19.
Author(s): Isaac Friend and Aleks Kissinger
Recent years have seen great interest in extending causal inference concepts developed in the context of classical statistical models to quantum theory. So far, this program has only barely addressed causal identification, a type of causal inference problem concerned with recovering from observation…
[Phys. Rev. A 109, 042214] Published Mon Apr 29, 2024
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Mon Apr 29 2024 00:26:14 (5 days)
# 20.
de Ronde, Christian and Fernández Mouján, Raimundo and Massri, Cesar (2024) Equivalence Relations in Quantum Theory: An Objective Account of Bases and Factorizations. [Preprint]
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