Phys. Rev. D 73, 024004 (2006) [11 pages]Boundary conditions in first order gravity: Hamiltonian and ensembleReceived 23 July 2005; revised 26 October 2005; published 9 January 2006 In this work two different boundary conditions for first order gravity, corresponding to a null and a negative cosmological constant, respectively, are studied. Both boundary conditions allow one to obtain the standard black hole thermodynamics. Furthermore, both boundary conditions define a canonical ensemble. Additionally the quasilocal energy definition is obtained for the null cosmological constant case. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.73.024004
DOI:
10.1103/PhysRevD.73.024004
PACS:
04.70.Dy, 04.70.Bw
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