Curvature-enhanced multipartite coherence in the multiverse*

作者：Shu-Min Wu, Chunxu Wang, Ruidi Wang, Jinxuan Li, X. L. Huang, Hao‐Sheng Zeng · 发表于：Chinese Physics C · 年份：2024 · DOI：10.1088/1674-1137/ad32bf · 被引用次数：10 · 研究领域：Quantum Information and Cryptography、Quantum Mechanics and Applications、Quantum optics and atomic interactions

Abstract Here, we study the quantum coherence of N -partite Greenberger-Horne-Zeilinger ( GHZ ) and W states in the multiverse consisting of N causally disconnected de Sitter spaces. Interestingly, N -partite coherence increases monotonically with curvature, whereas the curvature effect destroys quantum entanglement and discord, indicating that the curvature effect is beneficial to quantum coherence and harmful to quantum correlations in the multiverse. We find that with an increase in n expanding de Sitter spaces, the N -partite coherence of the GHZ state increases monotonically for any curvature, whereas the quantum coherence of the W state decreases or increases monotonically depending on the curvature. We find a distribution relationship, which indicates that the correlated coherence of the N -partite W state is equal to the sum of all bipartite correlated coherence in the multiverse. Multipartite coherence exhibits unique properties in the multiverse, suggesting that it may provide some evidence for the existence of the multiverse.