Investigation of traversable wormhole solutions in modified $$f(R)$$ f ( R ) gravity with scalar potential

Abstract

Abstract The objective of this manuscript is to investigate the traversable wormhole solutions in the background of the $$f(R, \phi )$$ f ( R , ϕ ) theory of gravity, where R is the Ricci scalar and $$\phi $$ ϕ is the scalar potential respectively. For this reason, we use the Karmarkar criterion for traversable static wormhole geometry to create a wormhole shape function. The suggested shape function creates wormhole geometry that links two asymptotically flat spacetime regions and meets the necessary requirements. The embedding diagram in three-dimensional Euclidean space is also discussed in order to demonstrate the wormhole configurations. For our current analysis, we choose the suitable values of free parameters for $$f(R, \phi )$$ f ( R , ϕ ) gravity models to discuss the wormhole geometry. It can be observed that our proposed shape function provides the wormhole solutions with less amount of exotic matter. It can be noticed that energy conditions especially null energy conditions are violated for all considered models. The violation of energy conditions indicates the existence of exotic matter and wormhole geometry. It is concluded that the shape function acquired through the Karmarkar technique yields validated wormhole configurations with even less exotic matter correlating to the chosen $$f(R, \phi )$$ f ( R , ϕ ) gravity models.