Results 31 to 40 of about 458,070 (185)
The generalized first law for more general matter
Journal of High Energy Physics, 2022 In previous work, a first law of generalized entropy was derived from semiclassical gravitational dynamics around thermal setups using an assumed relation between the matter modular Hamiltonian and the gravitational stress tensor.
Hong Zhe Chen
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Odessa Astronomical Publications, 2016 The existence of the Hubble flow recession of galaxies in terms of dominance of dark energy density, vacuum energy, reduces the gravitational entropy of clusters of galaxies, reducing the gravitational entropy of the Universe as a whole. Global dominance
О. V. Bukalov
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Beyond islands: a free probabilistic approach
Journal of High Energy Physics, 2023 We give a free probabilistic proposal to compute the fine-grained radiation entropy for an arbitrary bulk radiation state, in the context of the Penington-Shenker-Stanford-Yang (PSSY) model where the gravitational path integral can be implemented with ...
Jinzhao Wang
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Entropy revisited: the plausible role of gravitation [PDF]
Physics Letters A, 1999 We first present open questions related to the foundations of thermodynamics and statistical physics. We then argue that in principle one can not have "closed systems", and that a universal background should exist. We propose that the gravitational field plays this role, due to its vanishing energy-momentum tensor. This leads to a new possible picture,
Ben-Jacob, Eshel +2 more
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Entanglement entropy in cubic gravitational theories
Journal of High Energy Physics, 2021 We derive the holographic entanglement entropy functional for a generic gravitational theory whose action contains terms up to cubic order in the Riemann tensor, and in any dimension.
Elena Cáceres +2 more
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Classical and Quantum GravityAbstract We formulate the classical gravitational entropy of a horizon as a Noether charge that does not require the notion of a temperature, and which is applicable to horizons that are not necessarily associated with black holes. This introduces a correction to the covariant phase space formalism that accounts for the configuration ...
Sangmin Choi, Malcolm J Perry
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GRAVITATION AND VACUUM ENTANGLEMENT ENTROPY [PDF]
International Journal of Modern Physics D, 2012 The vacuum of quantum fields contains correlated fluctuations. When restricted to one side of a surface these have a huge entropy of entanglement that scales with the surface area. If UV physics renders this entropy finite, then a thermodynamic argument implies the existence of gravity.
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Geometric Entropy of Self-Gravitating Systems [PDF]
Entropy, 2007 We shall review different approaches to the entropy of self-gravitating systems inGeneral Relativity. Then we shall discuss in detail the macroscopic approach based on a la `Clausius point of view. Recent developments will be reviewed discussing the aims as well asthe assumptions which the framework is based on.
FATIBENE, Lorenzo +3 more
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Remarks on the Compatibility of Opposite Arrows of Time II
Entropy, 2006 In a series of papers [1,2,3], Lawrence Schulman presented examples which demonstrate the compatibility of opposite arrows of time in various situations.
H. D. Zeh
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Entanglement entropy of local gravitational quenches
Journal of High Energy Physics, 2023 We study the time dependence of Rényi/entanglement entropies of locally excited states created by fields with integer spins s ≤ 2 in 4 dimensions. For spins 0, 1 these states are characterised by localised energy densities of a given width which travel ...
Justin R. David, Jyotirmoy Mukherjee
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