Wormhole geometries in modified gravity

Details Wormhole geometries in modified gravity Wormhole geometries in modified gravity

2011-12-29

arxiv.org/abs/1112.6333v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, Prepared for the proceedings of the Spanish Relativity meeting (ERE2011), Madrid, Spain, 29Aug-2Sep 2011

Scientific paper

A fundamental ingredient in wormhole physics is the presence of exotic matter, which involves the violation of the null energy condition. Although a plethora of wormhole solutions have been explored in the literature, it is useful to find geometries that minimize the usage of exotic matter. In the context of modified gravity, it has also been shown that the normal matter can be imposed to satisfy the null energy condition, and it is the higher order curvature terms, interpreted as a gravitational fluid, that sustain these non-standard wormhole geometries, fundamentally different from their counterparts in general relativity. In this paper, we review recent work in wormhole physics in the context of modified theories of gravity.

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