2020/11/30 by M. Kord Zangeneh, Mahdi Kord Zangeneh, Francisco S. N. Lobo
Mathematics · Physics and Astronomy · #Barotropic fluid #Black Holes and Theoretical Physics #Classical mechanics #Context (archaeology) #Cosmology and Gravitation Theories #Energy condition #Equation of state #Exact solutions in general relativity #General relativity #Geometry #Gravitation #Mathematical physics #Mathematics #Mechanics #Null (SQL) #Physics #Quantum mechanics #Scalar (mathematics) #Scalar field #Solar and Space Plasma Dynamics #Spacetime #Stress–energy tensor #Tensor (intrinsic definition) #Theoretical physics #Wormhole #astro-ph.HE #gr-qc #hep-th
paper · pdf · doi:10.1140/epjc/s10052-021-09059-y
published as Eur. Phys. J. C 81, 285 (2021) · 9 pages, 6 figures. V2: Discussion and references added; now 11 pages, 6 figures. Accepted for publication in Eur.Phys.J.C
arxiv created 2021/03/13 · openalex publication_date 2021/04/01 · arxiv updated 2021/04/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract In this work, we analyse the evolution of time-dependent traversable wormhole geometries in a Friedmann–Lemaître–Robertson–Walker background in the context of the scalar–tensor representation of hybrid metric-Palatini gravity. We deduce the energy–momentum profile of the matter threading the wormhole spacetime in terms of the background quantities, the scalar field, the scale factor and the shape function, and find specific wormhole solutions by considering a barotropic equation of state for the background matter. We find that particular cases satisfy the null and weak energy conditions for all times. In addition to the barotropic equation of state, we also explore a specific evolving wormhole spacetime, by imposing a traceless energy–momentum tensor for the matter threading the wormhole and find that this geometry also satisfies the null and weak energy conditions at all times.