2021/04/26 by Chen-Lu Zhu, Chenlu Zhu, Zhu, Chen-Lu +9 · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #FOS: Physical sciences #Geometric phase #Mathematics #Multipartite #Open quantum system #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph) #Quantum discord #Quantum entanglement #Quantum mechanics #Qubit #Statistical physics #quant-ph
paper · pdf · doi:10.48550/arxiv.2104.12344
10 pages, 2 figures
openalex publication_date 2021/04/26 · arxiv created 2021/06/30 · arxiv updated 2021/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Radhakrishnan et.al [Phys. Rev. Lett. 124, 110401 (2020)] proposed quantum discord to multipartite systems and derived explicit formulae for any states. These results are significant in capturing quantum correlations for multi-qubit systems. In this paper, we evaluate the geometric measure of multipartite quantum discord and obtain results for a large family of multi-qubit states. %Intriguingly, our results demonstrate that for the family of states, multipartite geometric discord decreases exponentially as the number of parties increases while multipartite quantum discord not,therefore, we conclude that multipartite geometric discord could not reflect multipartite quantum discord in all cases. Furthermore, we investigated the dynamic behavior of geometric discord for the family of two-, three- and four-qubit states under phase noise acting on the first qubit. And we discover that sudden change of multipartite geometric discord can appear when phase noise act only on one part of the two-, three- and four-qubit states.