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arXiv 0907.3982hep-th
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基于修正色散关系的标度不变性

Scale Invariance from Modified Dispersion Relations

Yao Lu, Yun-Song Piao

摘要:

本文受Hoenava-Liftshit宇宙学中宇宙学扰动理论研究的启发,计算了具有修正色散关系ω \sim k^z/a^{p-1}的标量场引起的原初微扰谱,其中z是临界指数,p一般不等于z.我们讨论了对于固定的z,如果要求谱是尺度不变的,那么p应该如何依赖于背景演化。我们的结论是,总有一个房间的参数产生的尺度不变谱。

英文摘要:

In this paper, inspired by the investigations on the theory of cosmological perturbations in Hořava-Liftshit cosmology, we calculated the spectrum of primordial perturbation leaded by a scalar field with modified dispersion relation ω\sim k^z/a^{p-1}, in which z is the critical exponent and p is generally not equal to z. We discussed that for fixed z, if the spectrum is required to be scale invariant, how should p depend on the background evolution. We concluded that there is always a room of parameters for the generation of scale invariant spectrum.

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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