Renormalized stress tensor of a quantized massless scalar field in warped cosmological braneworld background

Energy momentum tensor of a conformally coupled quantum scalar field in five dimensional warped cosmological spacetimes is studied. We look at situations where the four dimensional part represents a cosmological thick brane and the scale of the extra dimension is time dependent. Renormalization of t...

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Bibliographic Details
Published inThe European physical journal. C, Particles and fields Vol. 79; no. 3; pp. 1 - 9
Main Author Ghosh, Suman
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2019
Springer
Springer Nature B.V
SpringerOpen
Subjects
Astronomy
Astrophysics and Cosmology
Branes
Density
Elementary Particles
Hadrons
Heavy Ions
Mathematical analysis
Measurement Science and Instrumentation
Momentum
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
Regularization
Regularization methods
String Theory
Tensors
Time dependence
Tribal colleges
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Summary:Energy momentum tensor of a conformally coupled quantum scalar field in five dimensional warped cosmological spacetimes is studied. We look at situations where the four dimensional part represents a cosmological thick brane and the scale of the extra dimension is time dependent. Renormalization of the components of the energy momentum tensor is achieved using adiabatic regularization method. The resulting energy and pressure densities explicitly show the effects of warping and the dynamic extra dimension on the created matter. We discussed how the created matter may accumulate to form thick branes along the extra dimension.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-019-6760-1