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arXiv 1303.4973hep-thastro-ph.CO
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单场暴胀与功率谱振荡的一个相容关系

A Consistency Relation for Single-Field Inflation with Power Spectrum Oscillations

Mark G. Jackson, Gary Shiu

摘要:

我们导出了单场暴胀标量微扰功率谱振荡频率的理论上界。振荡最自然地由具有变化相位的修改的真空产生。当这个相位快速变化时,它在标量涨落之间引起强相互作用。如果相互作用足够强,理论就不能用微扰理论来评估,因此对振荡频率施加了限制。这补充了温伯格发现的控制有效场论有效性的界限。广义的一致性关系也允许人们使用压缩配置的高点相关的功率谱振荡的约束。

英文摘要:

We derive a theoretical upper bound on the oscillation frequency in the scalar perturbation power spectrum of single-field inflation. Oscillations are most naturally produced by modified vacua with varying phase. When this phase changes rapidly, it induces strong interactions between the scalar fluctuations. If the interactions are sufficiently strong the theory cannot be evaluated using perturbation theory, hence imposing a limit on the oscillation frequency. This complements the bound found by Weinberg governing the validity of effective field theory. The generalized consistency relation also allows one to use squeezed configurations of higher-point correlations to place constraints on the power spectrum oscillations.

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