Systematic construction of genuine-multipartite-entanglement criteria in continuous-variable systems using uncertainty relations

作     者：F. Toscano A. Saboia A. T. Avelar S. P. Walborn 

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.