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  Thermal quantum spacetime

Kotecha, I. (2019). Thermal quantum spacetime. Universe, 5(8): 187. doi:10.3390/universe5080187.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-70B1-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-AAF0-D
Genre: Journal Article

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1907.07497.pdf (Preprint), 800KB
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 Creators:
Kotecha, Isha1, Author              
Affiliations:
1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc,High Energy Physics - Theory, hep-th
 Abstract: The intersection of thermodynamics, quantum theory and gravity has revealed many profound insights, all the while posing new puzzles. In this article, we discuss an extension of equilibrium statistical mechanics and thermodynamics potentially compatible with a key feature of general relativity, background independence; and we subsequently use it in a candidate quantum gravity system, thus providing a preliminary formulation of a thermal quantum spacetime. Specifically, we emphasise on an information-theoretic characterisation of generalised Gibbs equilibrium that is shown to be particularly suited to background independent settings, and in which the status of entropy is elevated to being more fundamental than energy. We also shed light on its intimate connections with the thermal time hypothesis. Based on this we outline a framework for statistical mechanics of quantum gravity degrees of freedom of combinatorial and algebraic type, and apply it in several examples. In particular, we provide a quantum statistical basis for the origin of covariant group field theories, shown to arise as effective statistical field theories of the underlying quanta of space in a certain class of generalised Gibbs states.

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 Dates: 2019-07-172019-08-122019
 Publication Status: Published in print
 Pages: v2 minor changes, published version; 19 pages, 1 figure; invited contribution to the special issue "Progress in Group Field Theory and Related Quantum Gravity Formalisms", eds. S. Carrozza, S. Gielen and D. Oriti
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 Identifiers: arXiv: 1907.07497
DOI: 10.3390/universe5080187
URI: http://arxiv.org/abs/1907.07497
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Title: Universe
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Pages: - Volume / Issue: 5 (8) Sequence Number: 187 Start / End Page: - Identifier: -