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arXiv 1605.09045hep-phastro-ph.HEgr-qchep-th
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非对易时空中的宇宙微波背景极化

Cosmic microwave background polarization in Noncommutative space-time

S. Batebi, M. Haghighat, R. Mohammadi, S. Tizchang

摘要:

在宇宙学的标准模型中,宇宙微波背景的B模偏振可以用暴胀时期的引力效应来解释。然而,这不是解释CMB的B模式偏振的唯一方法。结果表明,背景下的康普顿散射除了产生圆偏振微波外,还可导致微波背景的B模偏振。在这里,我们考虑的非交换(NC)的时空作为背景,探讨在最后的散射表面的CMB极化。通过对NC时空中的Compton散射进行修正,利用度规的标量微扰,得到了CMB辐射的B模谱。可以表明,即使对于大到$10TeV$的NC尺度,NC对CMB偏振和r参数的影响也是显著的。我们表明,V-模式的功率谱可以得到的线性偏振功率谱的范围内微米到纳米开尔文平方的NC尺度约$1TeV$到$10TeV$,分别。

英文摘要:

In the standard model of cosmology (SMC) the B-mode polarization of the CMB can be explained by the gravitational effects in the inflation epoch. However, this is not the only way to explain the B-mode polarization for the CMB. It can be shown that the Compton scattering in presence of a background besides generating a circularly polarized microwave, can leads to a B-mode polarization for the CMB. Here we consider the non-commutative (NC) space time as a background to explore the CMB polarization at the last scattering surface. We obtain the B-mode spectrum of the CMB radiation by scalar perturbation of metric via a correction on the Compton scattering in NC-space-time in terms of the circular polarization power spectrum and the non-commutative energy scale. It can be shown that even for the NC-scale as large as $10TeV$ the NC-effects on the CMB polarization and the r-parameter is significant. We show that the V-mode power spectrum can be obtained in terms of linearly polarized power spectrum in the range Micro to Nano-Kelvin squared for the NC-scale about $1TeV$ to $10TeV$, respectively.

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