Quantum phenomenological gravitational dynamics: a general view from thermodynamics of spacetime

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10424076" target="_blank" >RIV/00216208:11320/20:10424076 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.rDNiBgfMD" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.rDNiBgfMD</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP12(2020)196" target="_blank" >10.1007/JHEP12(2020)196</a>

Result language

angličtina

Original language name

Quantum phenomenological gravitational dynamics: a general view from thermodynamics of spacetime

Original language description

In this work we derive general quantum phenomenological equations of gravitational dynamics and analyse its features. The derivation uses the formalism developed in thermodynamics of spacetime and introduces low energy quantum gravity modifications to it. Quantum gravity effects are considered via modification of Bekenstein entropy by an extra logarithmic term in the area. This modification is predicted by several approaches to quantum gravity, including loop quantum gravity, string theory, AdS/CFT correspondence and generalised uncertainty principle phenomenology, giving our result a general character. The derived equations generalise classical equations of motion of unimodular gravity, instead of the ones of general relativity, and they contain at most second derivatives of the metric. We provide two independent derivations of the equations based on thermodynamics of local causal diamonds. First one uses Jacobson&apos;s maximal vacuum entanglement hypothesis, the second one Clausius entropy flux. Furthermore, we consider questions of diffeomorphism and local Lorentz invariance of the resulting dynamics and discuss its application to a simple cosmological model, finding a resolution of the classical singularity.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10300 - Physical sciences

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of High Energy Physics [online]

ISSN

1029-8479

e-ISSN

—

Volume of the periodical

2020

Issue of the periodical within the volume

12

Country of publishing house

DE - GERMANY

Number of pages

31

Pages from-to

196

UT code for WoS article

000605347000002

EID of the result in the Scopus database

2-s2.0-85098447658