Simple Emergent Power Spectra from Complex Inflationary Physics.
Simple Emergent Power Spectra from Complex Inflationary Physics.
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复杂暴胀物理学中的简单涌现功率谱。
DOI：
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发表时间：
2016
影响因子：
8.6
通讯作者：
David Mulryne
中科院分区：
文献类型：
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作者：
David Mulryne
利用非平衡随机矩阵理论构造了N_{f}相互作用标量场的随机标量势系综，并利用它们研究了小场暴胀过程中观测量的产生.当N_{f}=O（few）时，这些特征明显的标量势产生的功率谱是高度非线性的，与观测结果不一致。对于N_{f} ≠ 1，扰动的超视界演化一般是实质性的，但功率谱大大简化，变得更有预测性，大多数实现都能很好地近似为线性功率谱。这提供了一个原理性的证据，证明复杂的暴胀物理可以产生简单的涌现功率谱。我们解释了如何根据随机矩阵理论的大N_{f}普适性来理解这些结果。
We construct ensembles of random scalar potentials for N_{f}-interacting scalar fields using nonequilibrium random matrix theory, and use these to study the generation of observables during small-field inflation. For N_{f}=O(few), these heavily featured scalar potentials give rise to power spectra that are highly nonlinear, at odds with observations. For N_{f}≫1, the superhorizon evolution of the perturbations is generically substantial, yet the power spectra simplify considerably and become more predictive, with most realizations being well approximated by a linear power spectrum. This provides proof of principle that complex inflationary physics can give rise to simple emergent power spectra. We explain how these results can be understood in terms of large N_{f} universality of random matrix theory.
通货膨胀多领域模型的预测
影响因子：
6.4
作者：
Frazer J
通讯作者：
Frazer J