@article{04403a954a1445bd89f98927b6c224cf,
title = "Entanglement of the vacuum between left, right, future, and past: The origin of entanglement-induced quantum radiation",
abstract = "The Minkowski vacuum state is expressed as an entangled state between the left and right Rindler wedges when it is constructed on the Rindler vacuum. In this paper, we further examine the entanglement structure and extend the expression to the future (expanding) and past (shrinking) Kasner spacetimes. This clarifies the origin of the quantum radiation produced by an Unruh-DeWitt detector in uniformly accelerated motion in the four-dimensional Minkowski spacetime. We also investigate the two-dimensional massless case where the quantum radiation vanishes but the same entanglement structure exists.",
author = "Atsushi Higuchi and Satoshi Iso and Kazushige Ueda and Kazuhiro Yamamoto",
note = "Funding Information: This work is supported by MEXT/JSPS KAKENHI Grant Nos. 15H05895, 17K05444, and 17H06359 (K. Y.) and Nos. 23540329 and 16H06490 (S. I.). We thank R. Tatsukawa, Y. Nambu, J. Soda, S. Ishizaka, M. Iinuma, H. F. Hofmann, M. Hotta, R. Schutzhold, W. G. Unruh, P. Chen, S-Y. Lin, and B. L. Hu for useful comments. K. Y. is grateful for the warm hospitality of the Mathematics Department of the University of York, where we initiated this work. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = oct,
day = "15",
doi = "10.1103/PhysRevD.96.083531",
language = "English",
volume = "96",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "8",
}