Enhanced preheating after multi-field inflation: on the importance of being special
Enhanced preheating after multi-field inflation: on the importance of being special
复制标题
多场充气后加强预热：论特殊的重要性
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
J. Giblin
中科院分区：
文献类型：
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作者：
T. Battefeld;A. Eggemeier;J. Giblin
我们讨论了预热后多场膨胀中存在的几个预热物质场，成为轻的附近（但不是在）的暴胀的VEV，在不同的额外的物种点（ESP）;这种设置是由暴胀模型，包括粒子生产过程中的通货膨胀，例如捕获的通货膨胀，放牧ESP遇到或调制捕获，等等。虽然退相的暴胀子往往抑制参数共振，我们发现两个新的影响，导致有效的预热：粒子生产在第一次下降（有效的，如果许多预热物质领域存在）和随后的（窄）共振阶段（有效的，如果ESP恰好是在几个不同的距离之一，从暴胀子的VEV）。在第一次入流过程中产生的颗粒物是由许多物种组成的低占有数，而后者是由少数物种组成的高占有数。我们提供了分析描述的两个阶段的情况下，反反应，我们测试数值。我们进一步进行晶格模拟，以研究反反应的影响。我们发现共振是强大的，最有可能的原因暴胀衰变在多领域的陷阱通货膨胀，如果ESP分布密集。
We discuss preheating after multi-field inflation in the presence of several preheat matter fields that become light in the vicinity of (but not at) the inflatons' VEV, at distinct extra-species-points (ESP); this setup is motivated by inflationary models that include particle production during inflation, e.g. trapped inflation, grazing ESP encounters or modulated trapping, among others. While de-phasing of inflatons tends to suppress parametric resonance, we find two new effects leading to efficient preheating: particle production during the first in-fall (efficient if many preheat matter fields are present) and a subsequent (narrow) resonance phase (efficient if an ESP happens to be at one of several distinct distances from the inflatons' VEV). Particles produced during the first in-fall are comprised of many species with low occupation number, while the latter are made up of a few species with high occupation number. We provide analytic descriptions of both phases in the absence of back-reaction, which we test numerically. We further perform lattice simulations to investigate the effects of back-reaction. We find resonances to be robust and the most likely cause of inflaton decay in multi-field trapped inflation if ESP distributions are dense.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.