Phys. Rev. Lett. 69, 1849–1851 (1992)Black hole in three-dimensional spacetimeReceived 29 April 1992; published in the issue dated 28 September 1992 The standard Einstein-Maxwell equations in 2+1 spacetime dimensions, with a negative cosmological constant, admit a black hole solution. The 2+1 black hole—characterized by mass, angular momentum, and charge, defined by flux integrals at infinity—is quite similar to its 3+1 counterpart. Anti–de Sitter space appears as a negative energy state separated by a mass gap from the continuous black hole spectrum. Evaluation of the partition function yields that the entropy is equal to twice the perimeter length of the horizon. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.69.1849
DOI:
10.1103/PhysRevLett.69.1849
PACS:
04.20.Jb, 97.60.Lf
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