Agullo Ivan, Olmedo Javier, Sreenath V
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
Department of Physics, National Institute of Technology Karnataka, Surathkal, Mangalore 575025, India.
Phys Rev Lett. 2020 Jun 26;124(25):251301. doi: 10.1103/PhysRevLett.124.251301.
We introduce an extension of the standard inflationary paradigm on which the big bang singularity is replaced by an anisotropic bounce. Unlike in the big bang model, cosmological perturbations find an adiabatic regime in the past. We show that this scenario accounts for the observed quadrupolar modulation in the temperature anisotropies of the cosmic microwave background, and we make predictions for the polarization angular correlation functions E-E, B-B, and E-B, together with temperature-polarization correlations T-B and T-E, that can be used to test our ideas. We base our calculations on the bounce predicted by loop quantum cosmology, but our techniques and conclusions apply to other bouncing models as well.
我们引入了标准暴胀范式的一种扩展，其中大爆炸奇点被各向异性反弹所取代。与大爆炸模型不同，宇宙学微扰在过去存在一个绝热区域。我们表明，这种情形解释了宇宙微波背景温度各向异性中观测到的四极调制，并且我们对极化角关联函数E - E、B - B和E - B，以及温度 - 极化关联T - B和T - E做出了预测，这些可用于检验我们的想法。我们的计算基于圈量子宇宙学所预测的反弹，但我们的技术和结论也适用于其他反弹模型。
