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arXiv 2005.00981hep-thgr-qc
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从全息纠缠熵研究CMB温度涨落的长程关联

Long-range correlation of CMB temperature fluctuations from the holographic entanglement entropy

Hadyan Luthfan Prihadi, Donny Dwiputra, Freddy Permana Zen

摘要:

本文定义了生活在紧致$\text{CFT}_d$时空中的$N$分离子系统的全息多体纠缠熵。在大的$N$极限下,我们发现一阶全息纠缠熵扰动与子系统长度的变化成正比,并且具有对称(高斯)分布特性。从这一发现,我们建议构建两点关联函数的全息纠缠熵波动类似的宇宙微波背景(CMB)的温度波动分析中使用的一个。利用热力学第一定律,我们可以将纠缠熵的微小变化与温度波动联系起来。通过与Planck 2018 CMB数据从$j=2$到$j=2499$的比较,其中$j$表示多极矩,我们提取了与温度波动相对应的纠缠区尺寸分布。由于纠缠区的大小分布可以解释为CMB温度涨落,我们得出结论,纠缠可能在宇宙学的量子方面发挥作用。

英文摘要:

In this paper, we define the holographic multipartite entanglement entropy for $N$ separated subsystems living in a compact $\text{CFT}_d$ space-time. In a large $N$ limit, we find that the first-order holographic entanglement entropy perturbation is proportional to the change in the length of the subsystem and it has symmetric (Gaussian) distribution property. From that finding, we propose to construct two-point correlation functions of holographic entanglement entropy fluctuations analogous to the one that is used in the cosmic microwave background (CMB) temperature fluctuations analysis. Using the first law of thermodynamics, we may correlate tiny changes in entanglement entropy with the temperature fluctuations. By comparing with Planck 2018 CMB data from $j=2$ to $j=2499$ where $j$ denotes the multipole moment, we extract the distribution of the entangling region size that corresponds to the temperature fluctuations. Since the distribution of the entangling region size can be interpreted as the CMB temperature fluctuations, we conclude that entanglement might play a role in the quantum aspects of cosmology.

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