Effect of Schwinger pair production on the evolution of the Hubble constant in de~Sitter spacetime

In this proceeding we consider a massive charged scalar field in a uniform electric field background in a de~Sitter spacetime (dS). We compute the in-vacuum expectation value of the trace of the energy-momentum tensor for the created Schwinger pairs, and using adiabatic subtraction scheme the trace...

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Bibliographic Details
Main Authors Bavarsad, Ehsan, Kim, Sang Pyo, Stahl, Clément, Xue, She-Sheng
Format Journal Article
LanguageEnglish
Published 20.09.2019
Subjects
Physics - General Relativity and Quantum Cosmology
Physics - High Energy Physics - Theory
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Summary:In this proceeding we consider a massive charged scalar field in a uniform electric field background in a de~Sitter spacetime (dS). We compute the in-vacuum expectation value of the trace of the energy-momentum tensor for the created Schwinger pairs, and using adiabatic subtraction scheme the trace is regularized. The effect of the Schwinger pair creation on the evolution of the Hubble constant is investigated. We find that the production of the semiclassical pairs leads to a decay of the Hubble constant. Whereas, the production of a light scalar field in the weak electric field regime leads to a superacceleration phenomenon.
DOI:10.48550/arxiv.1909.09319