Abstract. This paper deals with some thermodynamical aspects of Lorentzian wormholes, including the formulation of the three main laws and the consideration of a possible thermal emission made up of some sort of phantom radiation coming out from the wormhole at a negative temperature. In order for these topics to be consistently developed we have used a 2+2 formalism first advanced by Hayward for spherically symmetric spacetimes, where a generalized surface gravity is defined on the trapping horizon. Our results generalize still further those of the already generalized gravitational thermodynamics.

PACS numbers: 04.62.+v, 04.70.Dy

Print publication: Issue 21 (7 November 2009)
Received 22 June 2009, in final form 4 September 2009
Published 6 October 2009