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arXiv 1503.08430astro-ph.COgr-qchep-th
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暴胀后引力粒子产生的多场表述

Multi-field formulation of gravitational particle production after inflation

Yuki Watanabe, Jonathan White

摘要:

我们研究多场暴胀模型,包含一个非平凡的场空间度量和一个非最小的引力和暴胀部门之间的耦合。在这样的模型中,我们知道即使没有明确的相互作用项,暴胀子扇区也可以由于与引力的非最小耦合而衰变为物质,从而在引力作用下重新加热宇宙。使用Bogoliubov方法,我们评估的引力衰变率的暴胀场标量和费米子,并分析再加热动力学。我们还讨论了如何解释的再热动力学不同,在所谓的约旦和爱因斯坦框架,强调Bogoliubov系数的计算是独立的框架中,其中一个开始。

英文摘要:

We study multi-field inflation models that contain a non-trivial field-space metric and a non-minimal coupling between the gravity and inflaton sectors. In such models it is known that even in the absence of explicit interaction terms the inflaton sector can decay into matter as a result of its non-minimal coupling to gravity, thereby reheating the Universe gravitationally. Using the Bogoliubov approach we evaluate the gravitational decay rates of the inflaton fields into both scalars and fermions, and analyse the reheating dynamics. We also discuss how the interpretation of the reheating dynamics differs in the so-called Jordan and Einstein frames, highlighting that the calculation of the Bogoliubov coefficients is independent of the frame in which one starts.

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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