Fermionic Schwinger effect and induced current in de Sitter space

Takahiro Hayashinaka, Tomohiro Fujita, Jun'Ichi Yokoyama

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


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.

Original languageEnglish
Article number010
JournalJournal of Cosmology and Astroparticle Physics
Issue number7
Publication statusPublished - 2016 Jul 8
Externally publishedYes


  • ination
  • physics of the early universe
  • primordial magnetic fields
  • quantum cosmology

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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