Nonlocality in the presence of superselection rules

被引:0
作者
Verstraete, F [1 ]
Schuch, N [1 ]
Cirac, JI [1 ]
机构
[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany
来源
FLUCTUATIONS AND NOISE IN PHOTONICS AND QUANTUM OPTICS II | 2004年 / 5468卷
关键词
D O I
10.1117/12.548387
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Effective superselection rules severely alter the possible operations that can be implemented on a distributed quantum system. Superselection rules appear in e.g. the context of experiments with entangled cold gases: in this case all local operations have to conserve the local particle number. These superselection rules enforces us to reconsider the notion of nonlocality, as the new constraint implies limitations on the local operations that can be implemented. This gives rise to a novel form of nonlocality, and it is possible to associate a new nonlocal resource to it. In this paper we characterize this new resource, quantify it and discuss some applications.
引用
收藏
页码:93 / 99
页数:7
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