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arXiv 0904.4117hep-th
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Horava-Lifshitz宇宙学中的原始微扰

Primordial Perturbation in Horava-Lifshitz Cosmology

Yun-Song Piao

摘要:

最近,Hoglavava提出了一个临界指数为z=3的紫外引力重正化理论。这可能意味着在早期宇宙的任何\sim t^n且n>1/3的膨胀中都能产生尺度不变的原初微扰,本文将通过求解早期宇宙任何背景演化的超声视界尺度上的微扰模运动方程来验证这一点。然而,研究发现,如果我们要求原初微扰的折叠数适合于可观测宇宙,则仍需满足n>1,除非UV区的尺度很低。

英文摘要:

Recently, Hořava has proposed a renormalizable theory of gravity with critical exponent z=3 in the UV. This proposal might imply the scale invariant primordial perturbation can be generated in any expansion of early universe with a\sim t^n and n>1/3, which, in this note, will be validated by solving the motion equation of perturbation mode on super sound horizon scale for any background evolution of early universe. However, it is found that it seems that if we require the efolding number of primordial perturbation is suitable for observable universe, n>1 still need to be satisfied, unless the scale of UV regime is quite low.

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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