Skip to Main content Skip to Navigation
Preprints, Working Papers, ...

Regular braneworlds with bulk fluids

Abstract : We review studies on the singularity structure and asymptotic analysis of a 3-brane (flat or curved) embedded in a five-dimensional bulk filled with a `perfect fluid' with an equation of state with the `pressure' and the `density' of the fluid depending on the fifth space coordinate. Regular solutions satisfying positive energy conditions in the bulk exist only in the cases of a flat brane with an EoS parameter equal to -1, or of AdS branes for EoS parameter values in suitable intervals. More cases can be found by gluing two regular branches of solutions at the position of the brane. However, only the case of a flat brane with an EoS parameter equal to -1 leads to finite Planck mass on the brane and thus localises gravity. In a more recent work, we showed that a way to rectify the previous findings and obtain a solution for a flat brane in a finite range of the EoS parameter, which is both free from finite-distance singularities and compatible with the physical conditions of energy and finiteness of four-dimensional Planck mass, is by introducing a bulk fluid component that satisfies a nonlinear equation of state.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03424086
Contributor : Inspire Hep Connect in order to contact the contributor
Submitted on : Wednesday, November 10, 2021 - 12:08:07 PM
Last modification on : Tuesday, November 16, 2021 - 5:25:19 AM

Links full text

Identifiers

Citation

Ignatios Antoniadis, Spiros Cotsakis, Ifigeneia Klaoudatou. Regular braneworlds with bulk fluids. 2021. ⟨hal-03424086⟩

Share

Metrics

Record views

29