Reheating a multi-throat universe by brane motion
Reheating a multi-throat universe by brane motion
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通过膜运动重新加热多喉宇宙
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
S. Mukohyama
中科院分区：
文献类型：
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作者：
S. Mukohyama
我们提出了一种机制，再加热后的通货膨胀在多喉的情况下弯曲的额外的维度。有效场论在标准模型（SM）膜上的有效性要求SM膜在暴胀期间的位置不同于暴胀之后的位置。后者应该是接近SM喉咙的尖端，但前者不是。在膨胀之后，当哈勃膨胀率变得足够低时，SM膜开始向尖端移动并最终振荡。膜运动激发了SM场，宇宙被重新加热。由于膜位置模与SM场之间的相互作用仅被局部弦尺度抑制，因此模有效地衰减到SM场中。
We propose a mechanism of reheating after inflation in multi-throat scenarios of warped extra dimensions. Validity of an effective field theory on the standard model (SM) brane requires that the position of the SM brane during inflation be different from the position after inflation. The latter is supposed to be near the tip of the SM throat but the former is not. After inflation, when the Hubble expansion rate becomes sufficiently low, the SM brane starts moving towards the tip and eventually oscillates. The SM fields are excited by the brane motion and the universe is reheated. Since interaction between the brane position modulus and the SM fields is suppressed only by the local string scale, the modulus effectively decays into the SM fields.