Magnetogenesis in bouncing cosmology

Peng Qian, Yi Fu Cai, Damien Easson, Zong Kuan Guo

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We consider the process of magnetogenesis in the context of nonsingular bounce cosmology. We show that large primordial magnetic fields can be generated during contraction without encountering strong coupling and backreaction issues. The fields may seed large-scale magnetic fields with observationally interesting strengths. This result leads to a theoretical constraint on the relation of the energy scale of the bounce cosmology to the number of effective e-foldings of the contracting phase in the case of scale invariance for the power spectrum of primordial magnetic fields. We show that this constraint can be satisfied in a sizable region of the parameter space for the nonsingular bounce cosmology.

Original languageEnglish (US)
Article number083524
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume94
Issue number8
DOIs
StatePublished - Oct 26 2016

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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