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$f({\sf R})$ Gravity Wormholes sourced by a Phantom Scalar Field (2107.09713v3)
Published 20 Jul 2021 in gr-qc and hep-th
Abstract: We derive an exact wormhole spacetime supported by a phantom scalar field in the context of $f({\sf R})$ gravity. Without specifying the form of the $f({\sf R})$ function, the scalar field self-interacts with a mass term potential that is derived from the scalar equation and the resulting $f({\sf R})$ model is purely supported by the scalar field and it is free of ghosts and avoids the tachyonic instability.
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