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Traversable wormholes: Minimum violation of the null energy condition revisited
Phys. Rev. D 76, 044017 – Published 22 August, 2007
DOI: https://doi.org/10.1103/PhysRevD.76.044017
Abstract
It was argued in literature that traversable wormholes can exist with an arbitrarily small violation of null energy conditions. I show that if the amount of exotic material near the wormhole throat tends to zero, either this leads to a horn instead of a wormhole or the throat approaches the horizon in such a way that infinitely large stresses develop on the throat.
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