Cosmological wormholes

Details Cosmological wormholes Cosmological wormholes

2009-01-08

arxiv.org/abs/0901.1153v3

Phys.Rev.D79:044034,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, 3 figures, published version in Physical Review D

Scientific paper

10.1103/PhysRevD.79.044034

Motivated by the cosmological wormhole solutions obtained from our recent numerical investigations, we provide a definition of a wormhole which applies to dynamical situations. Our numerical solutions do not have timelike trapping horizons but they are wormholes in the sense that they connect two or more asymptotic regions. Although the null energy condition must be violated for static wormholes, we find that it can still be satisfied in the dynamical context. Two analytic solutions for a cosmological wormhole connecting two Friedmann universes without trapping horizons are presented.

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