论文标题
从较高曲率耦合的重新加热阶段的通货膨胀磁发生
Inflationary magnetogenesis with reheating phase from higher curvature coupling
论文作者
论文摘要
我们研究了通货膨胀的磁场的产生，这是通过与RICCI标量和高斯 - 骨网不变式结合时通过电磁（EM）场的结合不变性而发生的。对于瞬时再加热的情况，目前磁场的产生强度太小，违反了观察性约束。但是，如果存在一个重新加热阶段，则解决了该问题，EFLED阶段的重新加热阶段。在重新加热期间，磁场的能量密度被视为$（a^3h）^{ - 2} $，之后，以$ a^{ - 4} $为$ a^{ - 4} $到当前的时代（这是$ a $是比例因子和$ h $ the Hubble参数）。发现这个加热阶段（以一定的e倍数，状态参数方程的恒定值和给定的加热温度为特征）使磁化模型与观察性约束兼容。该模型又提供了一种可行的方式，可以从宇宙微波背景辐射的数据分析中限制状态参数的再加热方程。此外，我们在当前情况下讨论了施温格的反应，并确定对状态参数的再加热方程的必要约束。
We investigate the generation of magnetic fields from inflation, which occurs via breakdown of the conformal invariance of the electromagnetic (EM) field, when coupled with the Ricci scalar and the Gauss-Bonnet invariant. For the case of instantaneous reheating, the resulting strength of the magnetic field at present is too small and violates the observational constraints. However, the problem is solved provided there is a reheating phase with a non-zero e-fold number. During reheating, the energy density of the magnetic field is seen to evolve as $(a^3H)^{-2}$ and, after that, as $a^{-4}$ up to the present epoch (here $a$ is the scale factor and $H$ the Hubble parameter). It is found that this reheating phase -- characterized by a certain e-fold number, a constant value of the equation of state parameter, and a given reheating temperature -- renders the magnetogenesis model compatible with the observational constraints. The model provides, in turn, a viable way of constraining the reheating equation of state parameter, from data analysis of the cosmic microwave background radiation. Moreover we discuss the Schwinger backreaction in the present context and determine the necessary constraints on the reheating equation of state parameter.
