Tradeoff between extractable mechanical work, accessible entanglement, and ability to act as a reference system, under arbitrary superselection rules

被引：96

作者：

Vaccaro, J. A. ^{[1
,2
]}

Anselmi, F. ^{[2
,3
]}

Wiseman, H. M. ^{[1
]}

Jacobs, K. ^{[1
,4
]}

机构：

[1] Griffith Univ, Ctr Quantum Dynam, Brisbane, Qld 4111, Australia

[2] Univ Hertfordshire, Quantum Phys Grp, Hatfield AL10 9AB, Herts, England

[3] Venetian Inst Mol Med, I-35129 Padua, Italy

[4] Univ Massachusetts, Dept Phys, Boston, MA 02125 USA

来源：

PHYSICAL REVIEW A | 2008年 / 77卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.77.032114

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Superselection rules (SSRs) limit the mechanical and quantum processing resources represented by quantum states. However, SSRs can be violated using reference systems to break the underlying symmetry. We show that there is a duality between the ability of a system to do mechanical work and to act as a reference system. Further, for a bipartite system in a globally symmetric pure state, we find a triality between the system's ability to do local mechanical work, its ability to do "logical work" due to its accessible entanglement, and its ability to act as a shared reference system.

引用

页数：12