English

Non-exotic wormholes in $f(R,L_m)$ gravity

General Relativity and Quantum Cosmology 2025-10-14 v1

Abstract

In the present analysis, we examine the potential existence of generalized wormhole models within the framework of newly developed extended f(R,Lm)f(R,L_m) gravity. We investigate both a linear model, f(R,Lm)=αR+βLmf(R,L_m)=\alpha R+\beta L_m, and a non-linear model, f(R,Lm)=R2+Lmαf(R,L_m)=\frac{R}{2}+ L^\alpha_m, to analyze traversable wormholes. By employing the variational approach, we derive modified versions of the field equations under the influence of an anisotropic matter source. A power-law shape function is applied, resulting in a linear equation of state for both radial and lateral pressures. Furthermore, we explore solutions characterized by a variable equation of state parameter. It was observed that the violation of energy conditions is influenced by the parameters α\alpha and β\beta. A wide range of non-exotic wormhole solutions was discovered, dependent on the specific parameters of the model. We demonstrate that wormholes with power-law shape functions yield solutions that comply with the energy conditions in both linear and non-linear forms of f(R,Lm)f(R, L_m). It is shown that the non-exotic wormhole solutions obtained within this framework are not isotropic.

Keywords

Cite

@article{arxiv.2510.11487,
  title  = {Non-exotic wormholes in $f(R,L_m)$ gravity},
  author = {Sara Rastgoo and Foad Parsaei},
  journal= {arXiv preprint arXiv:2510.11487},
  year   = {2025}
}