2001/06/25 by X. Wang, Xiaoguang Wang, Klaus Molmer +1 · 1 citation
Computer Science · Physics and Astronomy · #Entanglement witness #Multipartite entanglement #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum entanglement #Quantum many-body systems #Spin (aerodynamics) #Squashed entanglement #State (computer science) #W state #quant-ph
paper · pdf · doi:10.1140/epjd/e20020045
published as Eur. Phys. J. D 18, 385-391 (2002). · 7 pages, 3 figures
arxiv created 2001/06/25 · openalex publication_date 2002/03/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The concurrence, a quantitative measure of the entanglement between a pair of particles, is determined for the case where the pair is extracted from a symmetric state of N two-level systems. Examples are given for both pure and mixed states of the N-particle system, and for a pair extracted from two ensembles with correlated collective spins.