A tripartite entanglement in de Sitter spacetime

Sang Eon Bak, Paul M. Alsing, Warner A. Miller, Shahabeddin M. Aslmarand, Doyeol Ahn

Research output: Contribution to journalArticlepeer-review


We investigate the quantum correlation for tripartite entangled states in de Sitter space. First, we adopt the noisy quantum channel model. In this model, the expansion effect is represented by an operator sum representation with its corresponding Kraus operator. This map is shown to be trace-preserving and completely positive. Second, we analyze the quantum correlation by using the channel-state correspondence. For a large expansion rate, the tripartite mutual information has a large negative value, which corresponds to a small magnitude of bipartite mutual information. We relate this result with the challenge of recovering information from local measurements.

Original languageEnglish
Pages (from-to)462-474
Number of pages13
JournalChinese Journal of Physics
StatePublished - Apr 2024


  • Black hole horizon
  • Channel-state correspondence
  • General Relativity
  • Mutual information
  • Noisy quantum channel
  • Tripartite entanglement
  • de Sitter space time


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