Simple, exact model of quasisingle field inflation

Simple, exact model of quasisingle field inflation
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简单、精确的准单场膨胀模型

DOI:
10.1103/physrevd.101.063535
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发表时间:
2019
期刊:
影响因子:
5
通讯作者:
Y. Welling
Y. Welling
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Y. Welling

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在本文中,我们提出了一个简单但精确的准单场暴胀模型\cite{Chen:2009 zp,Chen:2009 we},其中微扰之间的耦合是完全受控的,例如,可以使其与任何期望的值保持恒定。这提供了一种方法来数值实现准单场暴胀,并在不同的制度,以测试其预测。我们确认,数值同意与等腰双谱和全形函数的分析预测具有良好的精度。
In this note we present a simple but exact model of quasi-single field inflation \cite{Chen:2009zp, Chen:2009we}, in which the couplings between perturbations are completely controlled, and for instance can be made constant with any desired value. This provides a way to numerically implement quasi-single field inflation and to test its predictions in various regimes. We confirm that the numerics agree to good accuracy with the analytical predictions for the isosceles bispectrum and the full shape function.
平移对称轨道膨胀:单场还是多场?
DOI: 10.1103/physrevd.102.021302
发表时间: 2020
期刊: Physical Review D
影响因子: 5
作者:
Achúcarro A
通讯作者: Achúcarro A