The null energy condition in dynamic wormholes

Details The null energy condition in dynamic wormholes The null energy condition in dynamic wormholes

1998-02-18

arxiv.org/abs/gr-qc/9802048v3

Phys.Rev.Lett. 81 (1998) 746-749

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages in RevTex; some textual changes made, references added and some key definitions refined

Scientific paper

10.1103/PhysRevLett.81.746

We extend previous proofs that violations of the null energy condition (NEC) are a generic and universal feature of traversable wormholes to completely non-symmetric time-dependent wormholes. We show that the analysis can be phrased purely in terms of local geometry at and near the wormhole throat, and do not have to make any technical assumptions about asymptotic flatness or other global properties. A key aspect of the analysis is the demonstration that time-dependent wormholes have two throats, one for each direction through the wormhole, and that the two throats coalesce only for the case of a static wormhole.

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