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
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.
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
摘要: We consider the possibility of inflationary magnetogenesis due to dynamical couplings of the elec-tromagnetic fields to gravity. We find that large primordial magnetic fields can be generated during inflation without the strong coupling problem,backreaction problem, or curvature perturbation problem, which seed large-scale magnetic fields with observationally interesting strengths.