The null energy condition in dynamic wormholes

Abstract

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.

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

References in corpus (7)

• Traversable wormholes: Some simple examples
• Traversable wormholes from surgically modified Schwarzschild spacetimes
• Geometric structure of the generic static traversable wormhole throat
• Dynamic wormholes, anti-trapped surfaces, and energy conditions
• Self-consistent Wormhole Solutions of Semiclassical Gravity
• Brans-Dicke wormholes in the Jordan and Einstein frames
• Evolving wormhole geometries

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