Logarithmic correction to BH entropy as Noether charge

R. Aros, D. E. Díaz, A. Montecinos

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

We consider the role of the type-A trace anomaly in static black hole solutions to semiclassical Einstein equations in four dimensions. Via Wald's Noether charge formalism, we compute the contribution to the entropy coming from the anomaly induced effective action and unveil a logarithmic correction to the Bekenstein-Hawking area law. The corrected entropy is given by a seemingly universal formula involving the coefficient a of the type-A trace anomaly, the Euler characteristic χH of the horizon and the value at the horizon φH of the solution to the uniformization problem for Q-curvature. Two instances are examined in detail: Schwarzschild and a four-dimensional massless topological black hole. We also find agreement with the logarithmic correction due to one-loop contribution of conformal fields in the Schwarzschild background.

Original languageEnglish
Article number12
JournalJournal of High Energy Physics
Volume2010
Issue number7
DOIs
Publication statusPublished - 2010

Keywords

  • Anomalies in field and string theories
  • Black holes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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