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arXiv 1406.6300hep-phastro-ph.COhep-th
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D项暴胀的混沌机制

The Chaotic Regime of D-Term Inflation

W. Buchmuller, V. Domcke, K. Schmitz

摘要:

我们认为D-长期通货膨胀的小耦合的暴胀物质领域。标准的混合暴胀在暴胀子场超过普朗克质量的临界值处结束。在随后的瀑布跃迁中,暴胀子继续其缓慢的滚动运动,而瀑布场则由于量子涨落而迅速增长。超过退相干时间,瀑布场变得经典,并接近依赖于时间的最小值,这是由暴胀子场的值和瀑布场的自相互作用。在暴胀的最后阶段,有效暴胀子势基本上是二次的,这导致了混沌暴胀的标准预测。该模型说明了如何在一个“混沌膨胀”的时期内结束一个大统一体尺度能量密度的假真空的衰减。

英文摘要:

We consider D-term inflation for small couplings of the inflaton to matter fields. Standard hybrid inflation then ends at a critical value of the inflaton field that exceeds the Planck mass. During the subsequent waterfall transition the inflaton continues its slow-roll motion, whereas the waterfall field rapidly grows by quantum fluctuations. Beyond the decoherence time, the waterfall field becomes classical and approaches a time-dependent minimum, which is determined by the value of the inflaton field and the self-interaction of the waterfall field. During the final stage of inflation, the effective inflaton potential is essentially quadratic, which leads to the standard predictions of chaotic inflation. The model illustrates how the decay of a false vacuum of GUT-scale energy density can end in a period of `chaotic inflation'.

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