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arXiv 2105.12554astro-ph.COhep-phhep-th
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暴胀过程中参数共振对Lyth束缚的突破

Beating the Lyth bound by parametric resonance during inflation

Yi-Fu Cai, Jie Jiang, Misao Sasaki, Valeri Vardanyan, Zihan Zhou

摘要:

我们提出了一种新的机制,增强原始引力波,而不会显着影响暴胀过程中产生的曲率扰动。这是由于共振放大的标量场波动的非线性来源而实现的。我们的结果是一个明确的尺度依赖的反例著名的Lyth界,这开辟了一个有前途的前景,产生可检测的膨胀张量模式与低尺度的通货膨胀和次普朗克场漂移。我们明确地证明了我们的机制与即将到来的宇宙微波背景B模式观测的可检验性。

英文摘要:

We propose a novel mechanism for enhancing the primordial gravitational waves without significantly affecting the curvature perturbations produced during inflation. This is achieved due to non-linear sourcing of resonantly amplified scalar field fluctuations. Our result is an explicit scale-dependent counter-example of the famous Lyth bound, which opens up a promising perspective of producing detectable inflationary tensor modes with low-scale inflation and a sub-Planckian field excursion. We explicitly demonstrate the testability of our mechanism with upcoming Cosmic Microwave Background B-mode observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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