  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.
