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D. Grumiller:
"Logarithmic corrections to the entropy of the exact string black hole";
in: "8th International Conference On Path Integrals From Quantum Information To Cosmology", herausgegeben von: C. Burdik, O. Navratil and S. Posta; JINR, Dubna, 2005, (eingeladen), ISBN: 5-9530-0100-2, 18 S.

Exploiting a recently constructed target space action for the exact string black hole, logarithmic corrections to the leading order entropy are studied. There are contributions from thermal fluctuations and from corrections due to alpha'>0 which for the microcanonical entropy appear with different signs and therefore may cancel each other, depending on the overall factor in front of the action. For the canonical entropy no such cancellation occurs. Remarks are made regarding the applicability of the approach and concerning the microstates. As a byproduct a formula for logarithmic entropy corrections in generic 2D dilaton gravity is derived.

Exploiting a recently constructed target space action for the exact string black hole, logarithmic corrections to the leading order entropy are studied. There are contributions from thermal fluctuations and from corrections due to alpha'>0 which for the microcanonical entropy appear with different signs and therefore may cancel each other, depending on the overall factor in front of the action. For the canonical entropy no such cancellation occurs. Remarks are made regarding the applicability of the approach and concerning the microstates. As a byproduct a formula for logarithmic entropy corrections in generic 2D dilaton gravity is derived.

http://publik.tuwien.ac.at/files/PubDat_170152.pdf

Projektleitung Daniel Grumiller:
Nichtperturbative Aspekte von 2d Dilatongravitation