Wormhole solutions and energy conditions in f(R,G)gravity

作     者：M Farasat Shamir G Mustafa Saad Waseem Mushtaq Ahmad M Farasat Shamir;G Mustafa;Saad Waseem;Mushtaq Ahmad

作者机构：National University of Computer and Emerging SciencesLahore CampusPakistan Department of MathematicsShanghai UniversityShanghai200444China National University of Computer and Emerging SciencesChiniot-Faisalabad CampusPakistan 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2021年第73卷第11期

页      面：131-141页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

主　　题：f(R,G)gravity energy conditions wormholes shape function 

摘      要：In this manuscript,the traversable wormhole solutions have been explored in modified f(R,G)gravity by taking into consideration the model f(R,G)=R+rG2,where R is the Ricci curvature scalar and G is the Gauss–Bonnet *** acceptable form of the redshift function has been incorporated which is a non-constant in nature along with the implementation of those already defined in literature,the two shape functions namely b(r)=r/exp(r-r0)and b(r)=r0log(r+1)/log(r0+1).It is shown by studying the energy condition and through the graphical analysis that the null energy bounds for the effective energy-momentum tensor are generally violated for the presence of the ordinary matter in modified f(R,G)*** conditions associated with the matter content threading the wormhole geometries are evaluated and in general are found to favor the null energy conditions in the vicinity of the wormhole throat,the existence of the nonexotic wormhole geometries threaded by the matter has been confirmed under this gravity.