Weekly Papers on Quantum Foundations (48)

The Metaphysics of Fibre Bundles 

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Sat Nov 26 2022 06:04:23 (3 hours)

# 1.

Jacobs, Caspar (2022) The Metaphysics of Fibre Bundles. [Preprint]

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Kuhn’s ‘5th Law of Thermodynamics’: Measurement, Data, and Anomalies 

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Fri Nov 25 2022 14:44:58 (18 hours)

# 2.

Bokulich, Alisa and Bocchi, Federica (2022) Kuhn’s ‘5th Law of Thermodynamics’: Measurement, Data, and Anomalies. [Preprint]

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Time for Pragmatism 

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Fri Nov 25 2022 04:07:15 (1 day)

# 3.

Price, Huw (2022) Time for Pragmatism. [Preprint]

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Can General Relativity play a role in galactic dynamics?. (arXiv:2211.11815v1 [gr-qc]) 

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gr-qc updates on arXiv.org

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Davide Astesiano, Matteo Luca Ruggiero

Wed Nov 23 2022 10:27:16 (2 days)

# 4.

We use the gravitoelectromagnetic approach to the solutions of Einstein’s equations in the weak-field and slow-motion approximation to investigate the impact of General Relativity on galactic dynamics. In particular, we focus on a particular class of the solutions for the gravitomagnetic field, and show that, contrary to what is expected, they may introduce non negligible corrections to the Newtonian velocity profile. The origin and the interpretation of these corrections are discussed and explicit applications to some galactic models are provided. These are the homogeneous solutions (HS) for the gravitomagnetic field, i.e. solutions with vanishing matter currents.

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Schr\”{o}dinger from Wheeler-DeWitt: The Issues of Time and Inner Product in Canonical Quantum Gravity. (arXiv:2211.11826v1 [gr-qc]) 

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gr-qc updates on arXiv.org

 by 

Ali Kaya

Wed Nov 23 2022 10:27:13 (2 days)

# 5.

The wave-function in quantum gravity is supposed to obey the Wheeler-DeWitt (WDW) equation, however there is neither a satisfactory probability interpretation nor a successful solution to the problem of time in the WDW framework. To gain some insight on these issues we compare quantization of ordinary systems, first in the usual way having the Schr\”{o}dinger equation and second by promoting them as parametrized theories by introducing embedding coordinate fields, which yields first class constraints and the WDW equation. We observe that the time evolution in the WDW framework can be described with respect to the embedding coordinates, where the WDW equation becomes Schr\”{o}dinger like, i.e. it involves first order timelike functional derivatives. Moreover, the equivalence with the ordinary quantization procedure determines a suitable Hilbert space with a viable probability interpretation. We then apply the same construction to general relativity by adding embedding fields without any prior coordinate choice. The reparametrized general relativity has two different types of diffeomorphism invariance, which arises from world-volume and target-space reparametrizations. As in the case of ordinary systems, the time evolution can be described with respect to the embedding fields and the WDW equation becomes Schr\”{o}dinger like; the construction is almost identical to an ordinary parametrized field theory in terms of time evolution and Hilbert space structure. However, this time, the constraint algebra enforces the wave-function to be in a subspace of states annihilated by an operator that can be identified as the Hamiltonian. The implications of these results for the canonical quantization program, and in particular for the minisuperspace quantum cosmology, are discussed.

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When gravity meets philosophy again: the Gravitas project. (arXiv:2211.12096v1 [physics.ed-ph]) 

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gr-qc updates on arXiv.org

 by 

Matteo Tuveri, Daniela Fadda, Viviana Fanti, Walter Bonivento

Wed Nov 23 2022 10:27:03 (2 days)

# 6.

Gravity is, by far, one of the scientific themes that have most piqued the curiosity of scientists and philosophers over the centuries. The history of science tells us that when the creative effort of physicists and philosophers to solve the main puzzles of the understanding of our universe met, a new conceptual revolution has started. However, since Einstein’s relativistic theories and the subsequent advent of quantum mechanics, physicists and philosophers have taken different paths, both kidnapped by the intrinsic conceptual and mathematical difficulties inherited by their studies. Is it possible to restore a unitary vision of knowledge, overcoming the scientific-humanistic dichotomy that has established itself over time? The answer is certainly not trivial, but we can start from school to experience a new vision of a unified knowledge. From this need, the Gravitas project has born. Gravitas is a multidisciplinary outreach and educational program devoted to high school students (17-19 years old) that mixes contemporary physics and the philosophy of science. Coordinated by the Cagliari Section of the National Institute of Nuclear Physics, in Italy, Gravitas has started on December 2021 with an unconventional online format: two researchers coming from different fields of research meet a moderator and informally discuss about gravity and related phenomena. The public can chat and indirectly interact with them during the YouTube live. The project involved about 250 students from 16 high schools in Sardinia, Italy. Students should also create posts thought for social media whose content is based on the seminars they attended during the project. We present the project and discuss its possible outcomings concerning the introduction of a multidisciplinary approach in teaching physics, philosophy, and the history of contemporary physics in high schools.

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Empiricism in the Philosophy of Science 

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Wed Nov 23 2022 04:29:35 (3 days)

# 7.

Cobb, David (2022) Empiricism in the Philosophy of Science. [Preprint]

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Cosmology and Convention 

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Wed Nov 23 2022 04:25:46 (3 days)

# 8.

Merritt, David (2017) Cosmology and Convention. Studies In History and Philosophy of Science Part B: Studies In History and Philosophy of Modern Physics, 57. pp. 41-52. ISSN 13552198

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Non-Kolmogorovian Probabilities and Quantum Technologies 

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Wed Nov 23 2022 04:24:00 (3 days)

# 9.

Holik, Federico (2022) Non-Kolmogorovian Probabilities and Quantum Technologies. Entropy.

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Mereological Atomism’s Quantum Problems 

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Mon Nov 21 2022 05:43:49 (5 days)

# 10.

Miller, Ryan (2022) Mereological Atomism’s Quantum Problems. In: UNSPECIFIED.

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Free Will in the Many-Worlds Interpretation of Quantum Mechanics 

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Mon Nov 21 2022 05:42:57 (5 days)

# 11.

Baker, David John (2022) Free Will in the Many-Worlds Interpretation of Quantum Mechanics. [Preprint]

arXiv:2211.02884 (physics)[Submitted on 3 Nov 2022]

Can quantum non-locality be connected to extra-dimensions?

Marco Genovese

Quantum non locality, as described by EPR paradox, represents one of the mysteries at the very foundations of quantum mechanics. Here we suggest to investigate if it can be understood by considering extra dimensions.

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