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Signals of multiparty entanglement and holography

Balasubramanian, Vijay; Kang, Monica Jinwoo; Murdia, Chitraang; Ross, Simon F.

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Authors

Vijay Balasubramanian

Monica Jinwoo Kang

Chitraang Murdia



Abstract

We study multiparty entanglement signals, which are functions of a quantum state that are non-zero only when the state has multiparty entanglement. We consider known signals of three- and four-party entanglement, and propose new signals for four- and higher-party entanglement. We make some remarks on their general properties, but mainly focus on using holographic states in AdS_3/CFT_2 as a test case to explore their properties. For both the AdS vacuum and multiboundary wormhole states, we find that the multiparty entanglement signals are generically non-zero and of order one in units of the central charge of the dual CFT, revealing substantial multiparty entanglement. In the large-horizon limit of multiboundary wormhole states, however, the signals for three or more parties become small, indicating the short-range nature of entanglement.

Citation

Balasubramanian, V., Kang, M. J., Murdia, C., & Ross, S. F. (2025). Signals of multiparty entanglement and holography. Journal of High Energy Physics, 2025(6), Article 68. https://doi.org/10.1007/jhep06%282025%29068

Journal Article Type Article
Acceptance Date Apr 22, 2025
Online Publication Date Jun 6, 2025
Publication Date 2025
Deposit Date Jun 11, 2025
Publicly Available Date Jun 11, 2025
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Electronic ISSN 1029-8479
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2025
Issue 6
Article Number 68
DOI https://doi.org/10.1007/jhep06%282025%29068
Public URL https://durham-repository.worktribe.com/output/4094191

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