Fermionic Schwinger effect and induced current in de Sitter space

We explore Schwinger effect of spin 1/2 charged particles with static electric field in 1+3 dimensional de Sitter spacetime. We analytically calculate the vacuum expectation value of the spinor current which is induced by the produced particles in the electric field. The renormalization is performed...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2016-07, Vol.2016 (7), p.10-10
Main Authors: Hayashinaka, Takahiro, Fujita, Tomohiro, Yokoyama, Jun'ichi
Format: Article
Language:English
Subjects:
CHARGED PARTICLES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COSMOLOGICAL INFLATION
DE SITTER GROUP
DE SITTER SPACE
ELECTRIC FIELDS
EXPECTATION VALUE
FERMIONS
FOUR-DIMENSIONAL CALCULATIONS
INFLATIONARY UNIVERSE
MAGNETIC FIELDS
QUANTUM COSMOLOGY
SCALAR FIELDS
SPACE-TIME
SPIN
SPINOR FIELDS
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Summary:We explore Schwinger effect of spin 1/2 charged particles with static electric field in 1+3 dimensional de Sitter spacetime. We analytically calculate the vacuum expectation value of the spinor current which is induced by the produced particles in the electric field. The renormalization is performed with the adiabatic subtraction scheme. We find that the current becomes negative, namely it flows in the direction opposite to the electric field, if the electric field is weaker than a certain threshold value depending on the fermion mass, which is also known to happen in the case of scalar charged particles in 1+3 de Sitter spacetime. Contrary to the scalar case, however, the IR hyperconductivity is absent in the spinor case.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2016/07/010