Evaporation induced traversability of the Einstein--Rosen wormhole

Details Evaporation induced traversability of the Einstein--Rosen wormhole Evaporation induced traversability of the Einstein--Rosen wormhole

2005-07-18

arxiv.org/abs/gr-qc/0507079v3

Phys.Rev. D73 (2006) 084006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

v.2 A bit of discussion has been added and a few references v.3 Insignificant changes to match the published version

Scientific paper

10.1103/PhysRevD.73.084006

Suppose, the Universe comes into existence (as classical spacetime) already with an empty spherically symmetric macroscopic wormhole present in it. Classically the wormhole would evolve into a part of the Schwarzschild space and thus would not allow any signal to traverse it. I consider semiclassical corrections to that picture and build a model of an evaporating wormhole. The model is based on the assumption that the vacuum polarization and its backreaction on the geometry of the wormhole are weak. The lack of information about the era preceding the emergence of the wormhole results in appearance of three parameters which -- along with the initial mass -- determine the evolution of the wormhole. For some values of these parameters the wormhole turns out to be long-lived enough to be traversed and to transform into a time machine.

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