TY - JOUR
T1 - Quantum correlations in de sitter space
AU - Soda, Jiro
AU - Kanno, Sugumi
AU - Shock, Jonathan P.
N1 - Funding Information:
Acknowledgments: SK was supported by IKERBASQUE, the Basque Foundation for Science. JShock is grateful for the National Research Foundation (NRF) of South Africa under grant number 87667. JSoda was in part supported by MEXT KAKENHI Grant Number 15H05895.
PY - 2017/3
Y1 - 2017/3
N2 - We study quantum correlation of a massive scalar field in a maximally entangled state in de Sitter space. We prepare two observers, one in a global chart and the other in an open chart of de Sitter space. We find that the state becomes less entangled as the curvature of the open chart gets larger. In particular, for the cases of a massless and a conformally coupled scalar field, the quantum entanglement vanishes in the limit of infinite curvature. However, we find that the quantum discord never disappears, even in the limit that entanglement disappears.
AB - We study quantum correlation of a massive scalar field in a maximally entangled state in de Sitter space. We prepare two observers, one in a global chart and the other in an open chart of de Sitter space. We find that the state becomes less entangled as the curvature of the open chart gets larger. In particular, for the cases of a massless and a conformally coupled scalar field, the quantum entanglement vanishes in the limit of infinite curvature. However, we find that the quantum discord never disappears, even in the limit that entanglement disappears.
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U2 - 10.3390/universe3010002
DO - 10.3390/universe3010002
M3 - Article
AN - SCOPUS:85064413843
VL - 3
JO - Universe
JF - Universe
SN - 2218-1997
IS - 1
M1 - 2
ER -