A tripartite entanglement in de Sitter spacetime

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-preser...

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Bibliographic Details
Published in:Chinese journal of physics (Taipei) 2024-04, Vol.88, p.462-474
Main Authors: Bak, Sang-Eon, Alsing, Paul M., Miller, Warner A., Aslmarand, Shahabeddin M., Ahn, Doyeol
Format: Article
Language:English
Subjects:
Black hole horizon
Channel-state correspondence
de Sitter space time
General Relativity
Mutual information
Noisy quantum channel
Tripartite entanglement
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Summary: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. [Display omitted] •Tripartite entangled states in de Sitter spacetime is investigated.•A noisy quantum channel model and channel-state correspondence is studied.•Tripartite mutual information has a large magnitude for large expansion rates.
ISSN:0577-9073
DOI:10.1016/j.cjph.2023.11.006