Speedy sound and cosmic structure.
Speedy sound and cosmic structure.
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DOI：
10.1103/physrevlett.100.231302
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发表时间：
2008-03
影响因子：
8.6
通讯作者：
J. Magueijo
中科院分区：
文献类型：
--
作者：
J. Magueijo
If the speed of sound were vastly larger in the early Universe, a near scale-invariant spectrum of density fluctuations could have been produced even if the Universe did not submit to conventional solutions to the horizon problem. We examine how the mechanism works, presenting full mathematical solutions and their heuristics. We then discuss several concrete models based on scalar fields and hydrodynamical matter that realize this mechanism, but stress that the proposed mechanism is more fundamental and general.
