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arXiv 1006.0935astro-ph.COgr-qc
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多场预热的引力辐射

Gravitational Radiation from Preheating with Many Fields

John T. Giblin, Larry R. Price, Xavier Siemens

摘要:

参数共振提供了一种机制,通过这种机制,粒子可以在暴胀后立即产生。到目前为止,人们的注意力集中在单个或多个暴胀子场耦合到单个标量场上。然而,一般来说,我们期望暴胀子与早期宇宙中存在的许多其他相对论自由度耦合。在本文中,我们使用模拟在一个不断扩大的弗里德曼-勒梅特-罗伯逊-沃克时空,预热是如何影响的多场耦合到暴胀子。我们把注意力集中在引力波的产生上--这是预热阶段的一个重要的潜在观测特征。我们发现,预热和它的引力波签名是强大的暴胀子耦合到更多的物质场。

英文摘要:

Parametric resonances provide a mechanism by which particles can be created just after inflation. Thus far, attention has focused on a single or many inflaton fields coupled to a single scalar field. However, generically we expect the inflaton to couple to many other relativistic degrees of freedom present in the early universe. Using simulations in an expanding Friedmann-Lemaître-Robertson-Walker spacetime, in this paper we show how preheating is affected by the addition of multiple fields coupled to the inflaton. We focus our attention on gravitational wave production--an important potential observational signature of the preheating stage. We find that preheating and its gravitational wave signature is robust to the coupling of the inflaton to more matter fields.

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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