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Cited by 588

The DOI matches its Crossref record; 13 of the 13 references it cites were found in a registry or an index.

Gravity and the thermodynamics of horizons

Open access
Padmanabhan, T.·2005·Physics Reports
DOI 10.1016/j.physrep.2004.10.003
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Abstract

Spacetimes with horizons show a resemblance to thermodynamic systems and it is possible to associate the notions of temperature and entropy with them. Several aspects of this connection are reviewed in a manner appropriate for broad readership. The approach uses two essential principles: (a) the physical theories must be formulated for each observer entirely in terms of variables any given observer can access and (b) consistent formulation of quantum field theory requires analytic continuation to the complex plane. These two principles, when used together in spacetimes with horizons, are powerful enough to provide several results in a unified manner. Since spacetimes with horizons have a generic behaviour under analytic continuation, standard results of quantum field theory in curved spacetimes with horizons can be obtained directly (Sections III to VII). The requirements (a) and (b) also put strong constraints on the action principle describing the gravity and, in fact, one can obtain the Einstein-Hilbert action from the thermodynamic considerations (Section VIII). The review emphasises the thermodynamic aspects of horizons, which could be obtained from general principles and is expected to remain valid, independent of the microscopic description (‘statistical mechanics’) of horizons.

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Metadata

Authors
Padmanabhan, T.
Venue
Physics Reports
Publisher
Elsevier BV
Published
2005-01
Volume
406
Issue
2
Pages
49-125
ISSN
0370-1573 (ISSN-L)
DOI
10.1016/j.physrep.2004.10.003
OpenAlex
W2122464632
Cited by
588
References
13
FWCI
11.94
Type
journal article
Language
en
Open access
green

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