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Wormholes supported by hybrid metric-Palatini gravity
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abstract
Recently, a modified theory of gravity was presented, which consists of the superposition of the metric Einstein-Hilbert Lagrangian with an $f(\cal R)$ term constructed \`{a} la Palatini. The theory possesses extremely interesting features such as predicting the existence of a long-range scalar field, that explains the late-time cosmic acceleration and passes the local tests, even in the presence of a light scalar field. In this brief report, we consider the possibility that wormholes are supported by this hybrid metric-Palatini gravitational theory. We present here the general conditions for wormhole solutions according to the null energy conditions at the throat and find specific examples. In the first solution, we specify the redshift function, the scalar field and choose the potential that simplifies the modified Klein-Gordon equation. This solution is not asymptotically flat and needs to be matched to a vacuum solution. In the second example, by adequately specifying the metric functions and choosing the scalar field, we find an asymptotically flat spacetime.
Forward citations
Cited by 6 Pith papers
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Nonlocal gravity in a proper tetrad frame: traversable wormholes
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A dynamical-systems analysis of f(R,ℛ) hybrid metric-Palatini gravity shows no global attractors in the cosmological phase space and only two classes of fixed-point scale factors, one of which predicts a jerk paramete...
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Spherically symmetric black holes and wormholes in hybrid metric-Palatini gravity
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Vector wormholes as conduits for matter interaction
Massive one-form fields, with a reconstructed self-interacting potential, can support traversable wormholes while ordinary matter in a specially tuned case satisfies all classical energy conditions.
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Novel electrically charged wormhole, black hole and black bounce exact solutions in hybrid metric-Palatini gravity
Exact charged solutions in hybrid metric-Palatini gravity with zero scalar potential produce traversable wormholes, double-horizon black holes, black bounces, and infinite-horizon spacetimes.
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