2015/05/31 by Sayan Kar, Sayantani Lahiri, Soumitra SenGupta · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Brane #Classical mechanics #Compactification (mathematics) #Context (archaeology) #Cosmology #Cosmology and Gravitation Theories #Dark energy #Energy condition #Exotic matter #Extra dimensions #General relativity #Geometry #Noncommutative and Quantum Gravity Theories #Physics #Pure mathematics #Quantum mechanics #Scalar (mathematics) #Scalar field #Theoretical physics #Wormhole #gr-qc #hep-th
paper · pdf · doi:10.1016/j.physletb.2015.09.039
13 pages, 6 figures, to appear in Physics Letters B
arxiv created 2015/09/16 · openalex publication_date 2015/09/21 · arxiv updated 2015/10/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We explore the existence of Lorentzian wormholes in the context of an effective on-brane, scalar-tensor theory of gravity. In such theories, the timelike convergence condition, which is always violated for wormholes, has contributions, via the field equations, from on-brane matter as well as from an effective geometric stress energy generated by a bulk-induced radion field. It is shown that, for a class of wormholes, the required on-brane matter, as seen by an on-brane observer in the Jordan frame, is not exotic and does not violate the Weak Energy Condition. The presence of the effective geometric stress energy in addition to on-brane matter is largely responsible for creating this intriguing possibility. Thus, if such wormholes are ever found to exist in the Universe, they would clearly provide pointers towards the existence of a warped extra dimension as proposed in the two-brane model of Randall and Sundrum.