Asymptotically flat spacetimes in 3D bigravity [PDF]
Hernan A. Gonzalez, Miguel PinoWe report that a class of three-dimensional bimetric theories contain asymptotically flat solutions. These spacetimes can be cast in a set of asymptotic conditions at null infinity which are preserved under the infinite dimensional BMS group. Moreover, the algebra of the canonical generators exhibits a central extension. The possibility that these solutions describe regular black holes is also discussed.View original: http://arxiv.org/abs/1207.0882
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