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          Institute: MPI für Gravitationsphysik     Collection: Quantum Gravity and Unified Theories     Display Documents



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ID: 207098.0, MPI für Gravitationsphysik / Quantum Gravity and Unified Theories
Asymptotic degeneracy of dyonic N=4 string states and black hole entropy
Authors:Cardoso, G. L.; De Wit, Bernard; Käppeli, Jürg; Mohaupt, Thomas
Language:English
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Journal of High Energy Physics
Volume:12
Sequence Number of Article:075
Review Status:not specified
Audience:Not Specified
Abstract / Description:It is shown that the asymptotic growth of the microscopic degeneracy of BPS dyons in four-dimensional N=4 string theory captures the known corrections to the macroscopic entropy of four-dimensional extremal black holes. These corrections are subleading in the limit of large charges and originate both from the presence of interactions in the effective action quadratic in the Riemann tensor and from non-holomorphic terms. The presence of the non-holomorphic corrections and their contribution to the thermodynamic free energy is discussed. It is pointed out that the expression for the microscopic entropy, written as a function of the dilaton field, is stationary at the horizon by virtue of the attractor equations.
External Publication Status:published
Document Type:Article
Communicated by:Hermann Nicolai
Affiliations:MPI für Gravitationsphysik/Quantum Gravity and Unified Theories
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