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作者机构:Instituto de Física Universidade Federal do Rio de Janeiro Caixa Postal 68528 Rio de Janeiro RJ 21941-972 Brazil Instituto de Física Universidade Federal de Goiás Caixa Postal 131 Goiânia GO 74001-970 Brazil
出 版 物:《Physical Review A》 (物理学评论A辑:原子、分子和光学物理学)
年 卷 期:2015年第92卷第5期
页 面:052316-052316页
核心收录:
学科分类:070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学]
基 金:Brazilian agency FAPERJ Brazilian agency CNPq Brazilian agency CAPES INCT-Informacao Quantica
主 题:QUANTUM systems RESEARCH ENTANGLEMENT network (Polymers) EQUALITY QUANTUM computing ENCRYPTION protocols
摘 要:A general procedure to construct criteria for identifying genuine multipartite continuous-variable entanglement is presented. It relies on the definition of adequate global operators describing the multipartite system, the positive partial transpose criterion of separability, and quantum-mechanical uncertainty relations. As a consequence, each criterion encountered consists of a single inequality that is nicely computable and experimentally feasible. Violation of the inequality is a sufficient condition for genuine multipartite entanglement. Additionally, we show that the previous work of van Loock and Furusawa [P. van Loock and A. Furusawa, Phys. Rev. A 67, 052315 (2003)] is a special case of our result.