Quantum discord in de Sitter space

@article{Kanno2016QuantumDI,
  title={Quantum discord in de Sitter space},
  author={Sugumi Kanno and Jonathan P. Shock and J. Soda},
  journal={Physical Review D},
  year={2016},
  volume={94},
  pages={125014}
}
We study quantum discord between two free modes of a massive scalar field in a maximally entangled state in de Sitter space. We introduce two observers, one in a global chart and the other in an open chart of de Sitter space, and the observers determine the quantum discord created by each detecting one of the modes. This situation is analogous to the relationship between an observer in a Minkowski chart and another in one of the two Rindler charts in flat space. We find that the state becomes… 

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