Wald's entropy is equal to a quarter of the horizon area in units of the effective gravitational coupling

Brustein, Ram; Gorbonos, Dan; Hadad, Merav

Wald's entropy is equal to a quarter of the horizon area in units of the effective gravitational coupling

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Datum

2009

Autor:innen

Brustein, Ram

Gorbonos, Dan

Hadad, Merav

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review D. American Physical Society (APS). 2009, 79(4), 044025. ISSN 0556-2821. eISSN 1089-4918. Available under: doi: 10.1103/PhysRevD.79.044025

Zusammenfassung

The Bekenstein-Hawking entropy of black holes in Einstein’s theory of gravity is equal to a quarter of the horizon area in units of Newton’s constant. Wald has proposed that in general theories of gravity the entropy of stationary black holes with bifurcate Killing horizons is a Noether charge which is in general different from the Bekenstein-Hawking entropy. We show that the Noether charge entropy is equal to a quarter of the horizon area in units of the effective gravitational coupling on the horizon defined by the coefficient of the kinetic term of a specific metric perturbation polarization on the horizon. We present several explicit examples of static spherically symmetric black holes.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Zitieren

ISO 690

BRUSTEIN, Ram, Dan GORBONOS, Merav HADAD, 2009. Wald's entropy is equal to a quarter of the horizon area in units of the effective gravitational coupling. In: Physical Review D. American Physical Society (APS). 2009, 79(4), 044025. ISSN 0556-2821. eISSN 1089-4918. Available under: doi: 10.1103/PhysRevD.79.044025

BibTex

@article{Brustein2009Walds-51509,
  year={2009},
  doi={10.1103/PhysRevD.79.044025},
  title={Wald's entropy is equal to a quarter of the horizon area in units of the effective gravitational coupling},
  number={4},
  volume={79},
  issn={0556-2821},
  journal={Physical Review D},
  author={Brustein, Ram and Gorbonos, Dan and Hadad, Merav},
  note={Article Number: 044025}
}

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