Computing the primordial power spectra directly

Computing the primordial power spectra directly
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直接计算原始功率谱

DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
R. Woodard
R. Woodard
中科院分区:
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文献类型:
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作者:
M. G. Romania;N. Tsamis;R. Woodard

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原初膨胀的树阶功率谱取决于模式函数的范数平方,该模式函数在早期振荡,然后冻结为恒定值。我们推导了功率谱的简单微分方程,避免了对模态函数的物理不相关相位进行数值模拟的需要。我们还推导了渐近展开式,该展开式在第一次跨越地平线之前的几次电子折叠之前都应该有效,从而避免了在长期暴胀期间从紫外线演化模式函数的需要。
The tree order power spectra of primordial inflation depend upon the norm-squared of mode functions which oscillate for early times and then freeze in to constant values. We derive simple differential equations for the power spectra, that avoid the need to numerically simulate the physically irrelevant phases of the mode functions. We also derive asymptotic expansions which should be valid until a few e-foldings before first horizon crossing, thereby avoiding the need to evolve mode functions from the ultraviolet over long periods of inflation.
DOI: 10.1088/0067-0049/192/2/18
发表时间: 2011-02-01
影响因子: 8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者: Wright, E. L.
DOI: 10.1016/j.physletb.2010.09.050
发表时间: 2010
期刊: Fuel and Energy Abstracts
影响因子: --
作者:
E.O. Kahya;V.K. Onemli;R.P. Woodard
通讯作者: R.P. Woodard