Fluctuations of inflationary magnetogenesis
Fluctuations of inflationary magnetogenesis
复制标题
暴胀磁生的波动
DOI：
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Giovannini
中科院分区：
文献类型：
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作者：
M. Giovannini
这种分析的目的是探索可以说的磁化不均匀性的增长率下两个并发的假设：一个阶段的准德西特动力学驱动的一个单一的暴胀子场和观众场耦合到重力和规范部门的同时存在。而不是调用特设的各种组件之间的相关性，系统的标量不均匀性对角化的两个规范不变的准正常模式，其加权和给出的曲率扰动共动正交超曲面。传统的绝热标量模式的优势意味着，如果传统的暴胀阶段要持续约70个Efolds，并且对于0.1和0.001之间的慢滚参数范围，磁化不均匀性的增长率必须不超过2.2哈勃单位。较长和较短的准德西特阶段的持续时间导致，分别更严格或更宽松的界限，无论如何比标准的反作用的要求施加在衡量部门的约束。由于2阶的临界增长率导致准平坦的磁能谱，增长率的上限意味着磁谱指数的下限。均匀曲率计的优点被强调，特别是利用整个治疗的多组分系统表征这类问题。
This analysis aims at exploring what can be said about the growth rate of magnetized inhomogeneities under two concurrent hypotheses: a phase of quasi-de Sitter dynamics driven by a single inflaton field and the simultaneous presence of a spectator field coupled to gravity and to the gauge sector. Instead of invoking ad hoc correlations between the various components, the system of scalar inhomogeneities is diagonalized in terms of two gauge-invariant quasi-normal modes whose weighted sum gives the curvature perturbations on comoving orthogonal hypersurfaces. The predominance of the conventional adiabatic scalar mode implies that the growth rate of magnetized inhomogeneities must not exceed 2.2 in Hubble units if the conventional inflationary phase is to last about 70 efolds and for a range of slow roll parameters between 0.1 and 0.001. Longer and shorter durations of the quasi-de Sitter stage lead, respectively, either to tighter or to looser bounds which are anyway more constraining than the standard backreaction demands imposed on the gauge sector. Since a critical growth rate of order 2 leads to a quasi-flat magnetic energy spectrum, the upper bounds on the growth rate imply a lower bound on the magnetic spectral index. The advantages of the uniform curvature gauge are emphasized and specifically exploited throughout the treatment of the multicomponent system characterizing this class of problems.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.