Classical and quantum correlation of quantum fluctuation

7th International Conference on Gravitation and Cosmology

Nambu, Y.^1

Department of Physics, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan^1

关键词: Inflationary universe;    Physical separation;    Quantum correlations;    Quantum discords;    Quantum field;    Quantum fluctuation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/484/1/012067/pdf
DOI  :  10.1088/1742-6596/484/1/012067

来源: IOP

【 摘 要 】

We have investigated the classical and quantum correlations of a quantum field in the inflationary universe using a particle detector model. We have found that the entanglement between two comoving detectors becomes zero after their physical separation exceeds the Hubble horizon. We have also found that the quantum discord, which is defined as the quantum part of total correlation, approaches zero on the super horizon scale.