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arXiv · 2308.08923

Existence of non-exotic traversable wormholes in squared trace extended gravity theory

S. K. Tripathy·D. Nayak·B. Mishra·D. Behera·S. K. Sahu
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Abstract

An extended gravity theory is used to explore the possibility of non-exotic matter traversable wormholes. In the extended gravity theory, additional terms linear and quadratic in the trace of the energy momentum tensor are considered in the Einstein-Hilbert action. Obviously, such an addition leads to violation of the energy-momentum tensor. The model parameters are constrained from the structure of the field equations. Non-exotic matter wormholes tend to satisfy the null energy conditions. We use two different traversable wormhole geometries namely an exponential and a power law shape functions to model the wormholes. From a detailed analysis of the energy conditions, it is found that, the existence of non-exotic matter traversable wormholes is not obvious in the model considered and its possibility may depend on the choice of the wormhole geometry. Also, we found that, non-exotic wormholes are possible within the given squared trace extended gravity theory for a narrow range of the chosen equation of state parameter.

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S. K. Tripathy, D. Nayak, B. Mishra, D. Behera, S. K. Sahu. 2023-08-17. Existence of non-exotic traversable wormholes in squared trace extended gravity theory. https://doi.org/10.1016/j.nuclphysb.2024.116513

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