Magnetogenesis in bouncing cosmology

分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-09-27

Peng Qian Yi-Fu Cai Damien A. Easson Zong-Kuan Guo

摘要： We consider the process of magnetogenesis in the context of nonsingular bounce cosmology. We show that large primordial magnetic #12;elds can be generated during contraction without encounter-ing strong coupling and backreaction issues. The #12;elds may seed large-scale magnetic #12;elds with observationally interesting strengths. This result leads to a the oretical constraint on the relation of the energy scale of the bounce cosmology to the number of e#11;ective e-folding of the contracting phase in the case of scale invariance for the power spectrum of primordial magnetic #12;elds. We show that this constraint can be satis#12;ed in a sizable region of the parameter space for the nonsingular bounce cosmology.

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