Weekly Papers on Quantum Foundations (29)

This is a list of this week’s papers on quantum foundations published in the various journals or uploaded to the preprint servers such as arxiv.org and PhilSci Archive.

Non-Hermitian Heisenberg representation

ScienceDirect Publication: Physics Letters A

on 2015-7-16 9:28pm GMT

Publication date: 25 September 2015
Source:Physics Letters A, Volume 379, Issue 36
Author(s): Miloslav Znojil
In a way paralleling the recently accepted non-Hermitian version of quantum mechanics in its Schrödinger representation (working often with the innovative and heuristically productive concept of PT -symmetry), it is demonstrated that it is also possible to construct an analogous non-Hermitian version of quantum mechanics in its Heisenberg representation.

Nonlocality and the Epistemic Interpretation of Quantum Mechanics

PhilSci-Archive: No conditions. Results ordered -Date Deposited.

on 2015-7-16 7:24pm GMT

Ben-Menahem, Yemima (2015) Nonlocality and the Epistemic Interpretation of Quantum Mechanics. UNSPECIFIED.

Entanglement and Nonlocality are Inequivalent for Any Number of Parties

PRL: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

on 2015-7-15 2:00pm GMT

Author(s): R. Augusiak, M. Demianowicz, J. Tura, and A. Acín

Understanding the relation between nonlocality and entanglement is one of the fundamental problems in quantum physics. In the bipartite case, it is known that these two phenomena are inequivalent, as there exist entangled states of two parties that do not violate any Bell inequality. However, except…

 

[Phys. Rev. Lett. 115, 030404] Published Wed Jul 15, 2015

Fundamental Constants in Physics and Their Time Variation. (arXiv:1507.02229v2 [hep-ph] UPDATED)

gr-qc updates on arXiv.org

on 2015-7-14 9:02am GMT

Authors: Joan Solà

There is no doubt that the field of Fundamental Constants in Physics and Their Time Variation is one of the hottest subjects in modern theoretical and experimental physics, with potential implications in all fundamental areas of physics research, such as particle physics, gravitation, astrophysics and cosmology. In this Special Issue, the state-of-the-art in the field is presented in detail.

Phenomenology of effective geometries from quantum gravity. (arXiv:1507.03205v1 [gr-qc])

gr-qc updates on arXiv.org

on 2015-7-14 9:02am GMT

Authors: Ricardo Gallego TorroméMarco LetiziaStefano Liberati

In a recent paper (arXiv:1412.6000) a general mechanism for emergence of cosmological space-time geometry from a quantum gravity setting was devised and departure from standard dispersion relations for elementary particle were predicted. We elaborate here on this approach extending the results obtained in that paper and showing that generically such a framework will not lead to higher order modified dispersion relations in the matter sector. Furthermore, we shall discuss possible phenomenological constraints to this scenarios showing that space-time will have to be by nowadays classical to a very high degree in order to be consistent with current observations.

Can gravitational collapse and black-hole evaporation be a unitary process after all?. (arXiv:1507.03025v1 [hep-th])

gr-qc updates on arXiv.org

on 2015-7-14 9:02am GMT

Authors: Slava Emelyanov

This paper shows a way of how one may resolve the non-unitarity problem in black-hole physics without modifications of the basic principles of local quantum field theory.

On the Common Structure of the Primitive Ontology Approach and the Information-Theoretic Interpretation of Quantum Theory

Latest Results for Topoi

on 2015-7-14 12:00am GMT

Abstract

We use the primitive ontology framework of Allori et al. to analyze the quantum information-theoretic interpretation of Bub and Pitowsky. There are interesting parallels between the two approaches, which differentiate them both from the more standard realist interpretations of quantum theory. Where they differ, however, is in terms of their commitments to an underlying ontology on which the manifest image of the world supervenes. Employing the primitive ontology framework in this way makes perspicuous the differences between the quantum information-theoretic interpretation, and the various realist interpretations of quantum theory. It also allows us to identify a sense in which the commitments of quantum information-theoretic interpretation are underspecified. Several possible ways of completing the interpretation are presented, and it is suggested that the most likely strategy would leave the information-theoretic interpretation such that it would fail to qualify as a theory, according to the primitive ontology approach.

Nonlocality and the Epistemic Interpretation of Quantum Mechanics

PhilSci-Archive: No conditions. Results ordered -Date Deposited.

on 2015-7-13 5:23pm GMT

Ben-Menahem, Yemima (2015) Nonlocality and the Epistemic Interpretation of Quantum Mechanics. UNSPECIFIED.

A note on black hole entropy in loop quantum gravity

Classical and Quantum Gravity – latest papers

on 2015-7-13 12:00am GMT

Several recent results have hinted that black hole thermodynamics in loop quantum gravity simplifies if one chooses an imaginary Barbero–Immirzi parameter ##IMG## [http://ej.iop.org/images/0264-9381/32/15/155009/cqg516439ieqn1.gif] {$\gamma =i$} . This suggests a connection with ##IMG## [http://ej.iop.org/images/0264-9381/32/15/155009/cqg516439ieqn2.gif] {$\mathrm{SL}(2,{\mathbb{C}})$} or ##IMG## [http://ej.iop.org/images/0264-9381/32/15/155009/cqg516439ieqn3.gif] {$\mathrm{SL}(2,{\mathbb{R}})$} conformal field theories at the ‘boundaries’ formed by spin network edges intersecting the horizon. I present a bit of background regarding the relevant conformal field theories, along with some speculations about how they might be used to count black hole states. I show, in particular, that a set of unproven but plausible assumptions can lead to a boundary conformal field theory whose density of states matches the Bekenstei…

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