On Two-Distillable Werner States

被引：7
作者：
Dokovic, Dragomir Z. [1 ,2 ]
机构：
[1] Univ Waterloo, Dept Pure Math, Waterloo, ON N2L 3G1, Canada
[2] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada
来源：
ENTROPY | 2016年 / 18卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Werner states; bipartite entangled states; distillable states; hermitian biquadratic forms; BOUND ENTANGLEMENT; DISTILLATION; DISTILLABILITY; SEPARABILITY;
D O I：
10.3390/e18060216
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We consider bipartite mixed states rho in a d circle times d quantum system. We say that rho is PPT if its partial transpose 1 circle times T (rho) is positive semidefinite, and otherwise rho is NPT. The well-known Werner states are divided into three types: (a) the separable states (the same as the PPT states); (b) the one-distillable states (necessarily NPT); and (c) the NPT states which are not one-distillable. We give several different formulations and provide further evidence for the validity of the conjecture that Werner states of type (c) are not two-distillable.
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页数：19
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