Quantum correlations in de sitter space

Jiro Soda, Sugumi Kanno, Jonathan P. Shock

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Article number2
Issue number1
Publication statusPublished - Mar 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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