Fate of three-dimensional black holes coupled to a scalar field and the Bekenstein-Hawking entropy

Mar, 2004
10 pages
Published in:
  • Phys.Lett.B 597 (2004) 237-242
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Abstract:
Three-dimensional black holes coupled to a self-interacting scalar field is considered. It is known that its statistical entropy alaa' la Strominger does notnot agree with the Bekenstein-Hawking (BH) entropy. However I show that, by a careful treatment of the vacuum state in the {\it canonical} ensemble with a fixed temperature, which is the same as that of the BTZ black hole without the scalar field, the BH entropy is exactly produced by the Cardy's formula. I discuss its several implications, including the fate of black holes, no-scalar-hair theorems, stability, mirror black holes, and one-loop corrections.
  • 11.40.-q
  • 04.70.Dy
  • 04.20.Jb
  • Black hole entropy
  • Statistical mechanics
  • No-hair theorem
  • gravitation
  • field theory: scalar
  • dimension: 3
  • black hole