Modified-gravity wormholes without exotic matter
Tiberiu HarkoDepartment of Mathematics, University College London, Gower Street, London WC1E 6BT, United KingdomFrancisco S. N. LoboCentro de Astronomia e Astrofísica da Universidade de Lisboa, Campo Grande, Edifício C8 1749-016 Lisboa, PortugalM. K. MakDepartment of Physics and Center for Theoretical and Computational Physics, The University of Hong Kong, Pok Fu Lam Road, Hong KongSergey V. SushkovInstitute of Physics, Kazan Federal University, Kremlevskaya Street 18, Kazan 420008, Russia
2013en
ABI
Аннотация
A fundamental ingredient in wormhole physics is the flaring-out condition at the throat which, in classical general relativity, entails the violation of the null energy condition. In this work, we present the most general conditions in the context of modified gravity, in which the matter threading the wormhole throat satisfies all of the energy conditions, and it is the higher order curvature terms, which may be interpreted as a gravitational fluid, that support these nonstandard wormhole geometries. Thus, we explicitly show that wormhole geometries can be theoretically constructed without the presence of exotic matter but are sustained in the context of modified gravity.
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