Weekly Papers on Quantum Foundations (10)

Bridgman and the Normative Independence of Science: An Individual Physicist in the Shadow of the Bomb 

from philsciSat Mar 16 2024 03:22:15 (1 day)# 1.

Jalloh, Mahmoud (2024) Bridgman and the Normative Independence of Science: An Individual Physicist in the Shadow of the Bomb. [Preprint]

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Laws of nature as results of a trade-off — Rethinking the Humean trade-off conception 

from philsciSat Mar 16 2024 03:21:31 (1 day)# 2.

Linnemann, Niels and Michels, Robert (2024) Laws of nature as results of a trade-off — Rethinking the Humean trade-off conception. [Preprint]

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The fifth Solvay Congress really over or still open Between Physics and Philosophy 

from philsciSat Mar 16 2024 03:20:41 (1 day)# 3.

Scano, Pier Sandro (2024) The fifth Solvay Congress really over or still open Between Physics and Philosophy. [Preprint]

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Does one still need to “shut up and calculate”? 

from quant-ph by Masud MansuripurFri Mar 15 2024 08:37:20 (2 days)# 4.

arXiv:2403.08842v1 Announce Type: new Abstract: In learning quantum mechanics, an essential question has always been: How does one go about developing a “physical feel” for quantum phenomena? Naturally, one needs a basis or ground zero to start from, and that basis must be unlike anything with which we are already familiar in consequence of our experiences with the world of classical physics. We argue (channeling Richard Feynman) that the most elementary and the least cumbersome concept to build upon is the existence of complex probability amplitudes for physical events. An event that can take place in multiple alternative ways should be treated by adding the corresponding amplitudes when the paths are, in principle, indistinguishable, and by adding the probabilities themselves when the paths are distinguishable. Once we accept this principle and hone our intuition by examining quantum phenomena in its light, we will be on the path to “understanding” quantum mechanics. Elementary examples from the field of quantum optics demonstrate how adherence to Feynman’s principle could lead to a better, more “intuitive” appreciation for the magic of quantum mechanics.

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Current experimental upper bounds on spacetime diffusion 

from quant-ph by Martijn Janse, Dennis G. Uitenbroek, Loek van Everdingen, Jaimy Plugge, Bas Hensen, Tjerk H. OosterkampFri Mar 15 2024 08:37:17 (2 days)# 5.

arXiv:2403.08912v1 Announce Type: new Abstract: A consistent theory describing the dynamics of quantum systems interacting on a classical space-time was recently put forward by Oppenheim et al..[1, 2]. Quantum states may retain their coherence, at the cost of some amount of stochasticity of the spacetime metric, characterized by a spacetime diffusion parameter. Here, we report existing experimental upper bounds on such space-time diffusion, based on a review of several types of experiments with very low force noise over a broad range of test masses from single atoms to several kilograms. We find an upper bound at least 15 orders of magnitude lower as compared to the initial bounds for explicit models presented by Oppenheimn et al. The results presented here provide a path forward for future experiments that can help evaluate classical-quantum theories

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Spinfoam Models for Quantum Gravity: Overview 

from gr-qc by Etera R. LivineFri Mar 15 2024 08:37:13 (2 days)# 6.

arXiv:2403.09364v1 Announce Type: new Abstract: In the quest of a physical theory of quantum gravity, spin foam models, or in short spinfoams, propose a well-defined path integral summing over quantized discrete space-time geometries. At the crossroad of topological quantum field theory, dynamical triangulations, Regge calculus, and loop quantum gravity, this framework provides a non-perturbative and background independent quantization of general relativity. It defines transition amplitudes between quantum states of geometry, and gives a precise picture of the Planck scale geometry with quantized areas and volumes. Gravity in three space-time dimensions is exactly quantized in terms of the Ponzano-Regge state-sum and Turaev-Viro topological invariants. In four space-time dimensions, gravity is formulated as a topological theory, of the BF type, with extra constraints, and hence quantized as a topological state-sum filled with defects. This leads to the Engle-Pereira-Rovelli-Livine (EPRL) spinfoam model, that can be used for explicit quantum gravity computations, for example for resolving the Big Bang singularity by a bounce or in black-to-white hole transition probability amplitudes.

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A new approach towards quantum foundation and some consequences 

from quant-ph by Inge S. HellandFri Mar 15 2024 08:37:02 (2 days)# 7.

arXiv:2403.09224v1 Announce Type: new Abstract: A general theory based upon 6 postulates is introduced. The basical notions are theoretical variables that are associated with an observer or with a group of communicating observers. These variables may be accessible or inaccessible. From these postulates, the ordinary formalism of quantum theory are derived. The mathematical derivations are not given in this article, but I refer to the recent articles [9, 10]. Three possible applications of the general theory can be given; 1) The variables may decision variables connected to the decisions of a person or of a group of persons. 2) The variables may be statistical parameters or future data, But most importantly here: 3) The variables are physical variables in some context. This last application gives a completely new foundation of quantum mechanics, a foundation which in my opinion is much more easy to understand than the ordinary formalism.The other applications seem also to give interesting consequences of the approach. Socalled paradoxes like that of Schr\”odinger’s cat can be clarified under the theory. Explanations of the outcomes of David Bohm’s version of the EPR experiment and of the Bell experiment are provided. Finally, references to links towards relativity theory and to quantum field theory are given.

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Black Hole Paradoxes: A Unified Framework for Information Loss 

from philsciThu Mar 14 2024 17:58:12 (2 days)# 8.

Dulani, Saakshi (2024) Black Hole Paradoxes: A Unified Framework for Information Loss. [Preprint]

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GR as a classical spin-2 theory? 

from philsciThu Mar 14 2024 17:56:02 (2 days)# 9.

Linnemann, Niels and Smeenk, Chris and Baker, Mark Robert (2023) GR as a classical spin-2 theory? Philosophy of Science. ISSN 1539-767X

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Bell Correlations as Selection Artefacts 

from physics.hist-ph by Huw Price, Ken WhartonThu Mar 14 2024 11:21:11 (3 days)# 10.

arXiv:2309.10969v3 Announce Type: replace-cross Abstract: We show that Bell correlations may arise as a special sort of selection artefact, produced by ordinary control of the initial state of the experiments concerned. This accounts for nonlocality, without recourse to any direct spacelike causality or influence. The argument improves an earlier proposal in (arXiv:2101.05370v4 [quant-ph], arXiv:2212.06986 [quant-ph]) in two main respects: (i) in demonstrating its application in a real Bell experiment; and (ii) in avoiding the need for a postulate of retrocausality. This version includes an Appendix, discussing the relation of the proposal to the conclusions of Wood and Spekkens (arXiv:1208.4119 [quant-ph]).

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Cantor, Choice, and Paradox 

from philsciTue Mar 12 2024 16:24:59 (5 days)# 11.

DiBella, Nicholas (2024) Cantor, Choice, and Paradox. [Preprint]

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QCD at 50: Golden Anniversary, Golden Insights, Golden Opportunities 

from physics.hist-ph by Frank WilczekTue Mar 12 2024 12:40:28 (5 days)# 12.

arXiv:2403.06038v1 Announce Type: cross Abstract: The bulk of this paper centers around the tension between confinement and freedom in QCD. I discuss how it can be understood heuristically as a manifestation of self-adhesive glue and how it fits within the larger contexts of energy-time uncertainty and $\textit{real virtuality}$. I discuss the possible emergence of $\textit{treeons}$ as a tangible ingredient of (at least) pure gluon $SU(3)$. I propose $\textit{flux channeling}$ as a method to address that and allied questions about triality flux numerically, and indicate how to implement it for electric and magnetic flux in material systems. That bulk is framed with broad-stroke, necessarily selective sketches of the past and possible future of strong interaction physics. At the end, I’ve added an expression of gratitude for my formative experience at the Erice school, in 1973.

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From S-matrix theory to strings: Scattering data and the commitment to non-arbitrariness 

from philsciTue Mar 12 2024 03:50:52 (5 days)# 13.

van Leeuwen, Robert (2023) From S-matrix theory to strings: Scattering data and the commitment to non-arbitrariness. [Preprint]

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Unexpected Quantum Indeterminacy 

from philsciTue Mar 12 2024 03:49:15 (5 days)# 14.

Oldofredi, Andrea (2024) Unexpected Quantum Indeterminacy. [Preprint]

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Do arbitrary constants exist? A logical objection 

from philsciMon Mar 11 2024 16:05:26 (6 days)# 15.

Srinivasan, Radhakrishnan (2024) Do arbitrary constants exist? A logical objection. [Preprint]

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Precise Measurement of Hydrogen’s Energy Levels 

from APS selected papers by Ulrich D. JentschuraMon Mar 11 2024 06:00:00 (6 days)# 16.

Author(s): Ulrich D. Jentschura

Researchers have measured the transition energy of several highly excited states, which could help resolve a discrepancy about the size of the proton.

[Physics 17, 39] Published Mon Mar 11, 2024

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Physical Necessitism 

from philsciSun Mar 10 2024 01:56:35 (1 week)# 17.

Khudairi (Bowen), Hasen (Tim) (2014) Physical Necessitism. [Preprint]

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Promising Stabs in the Dark: Theory Virtues and Pursuit-Worthiness in the Dark Energy Problem 

from philsciSun Mar 10 2024 01:55:12 (1 week)# 18.

Wolf, William J. and Duerr, Patrick M. (2024) Promising Stabs in the Dark: Theory Virtues and Pursuit-Worthiness in the Dark Energy Problem. [Preprint]

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Hard Problems, Interpretive Concepts, and Humean Laws 

from philsciSun Mar 10 2024 01:52:45 (1 week)# 19.

Halpin, John F. (2024) Hard Problems, Interpretive Concepts, and Humean Laws. [Preprint]

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Not Even Ideal. Kant on Absolute Time and Gödel’s Rotating Universes. 

from philsciSun Mar 10 2024 01:51:03 (1 week)# 20.

De Bianchi, Silvia (2024) Not Even Ideal. Kant on Absolute Time and Gödel’s Rotating Universes. [Preprint]

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The Causal Axioms of Algebraic Quantum Field Theory: A Diagnostic 

from philsciSun Mar 10 2024 01:49:47 (1 week)# 21.

Calderón, Francisco (2024) The Causal Axioms of Algebraic Quantum Field Theory: A Diagnostic. In: UNSPECIFIED.

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