期刊
PHYSICAL REVIEW D
卷 83, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.124048
关键词
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资金
- NSF [PHY-0601800, PHY-0903572]
- Maryland Center for Fundamental Physics
- Direct For Mathematical & Physical Scien
- Division Of Physics [0903572] Funding Source: National Science Foundation
We study the classical second law of black hole thermodynamics, for Lovelock theories (other than general relativity), in arbitrary dimensions. Using the standard formula for black hole entropy, we construct scenarios involving the merger of two black holes in which the entropy instantaneously decreases. Our construction involves a Kaluza-Klein compactification down to a dimension in which one of the Lovelock terms is topological. We discuss some open issues in the definition of the second law which might be used to remove this entropy decrease.
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