Entropy of isolated horizons revisited
- SN Bose National Centre for Basic Sciences, Kolkata 700 098 (India)
The decade-old formulation of the isolated horizon classically and within loop quantum gravity, and the extraction of the microcanonical entropy of such a horizon from this formulation, is reviewed, in view of recent renewed interest. There are two main approaches to this problem: one employs an SU(2) Chern-Simons theory describing the isolated horizon degrees of freedom, while the other uses a reduced U(1) Chern-Simons theory obtained from the SU(2) theory, with appropriate constraints imposed on the spectrum of boundary states ''living'' on the horizon. It is shown that both these ways lead to the same infinite series asymptotic in the horizon area for the microcanonical entropy of an isolated horizon. The leading area term is followed by an unambiguous correction term logarithmic in area with a coefficient -(3/2), with subleading corrections dropping off as inverse powers of the area.
- OSTI ID:
- 21410117
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevD.82.024007; (c) 2010 The American Physical Society; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rotating black hole entropy from M5-branes
Precision microstate counting for the entropy of wrapped M5-branes
Related Subjects
ASYMPTOTIC SOLUTIONS
CORRECTIONS
DEGREES OF FREEDOM
ENTROPY
QUANTUM FIELD THEORY
QUANTUM GRAVITY
SPECTRA
SU-2 GROUPS
U-1 GROUPS
FIELD THEORIES
LIE GROUPS
MATHEMATICAL SOLUTIONS
PHYSICAL PROPERTIES
SU GROUPS
SYMMETRY GROUPS
THERMODYNAMIC PROPERTIES
U GROUPS