Mixed-state entanglement and distillation: Is there a "bound" entanglement in nature?

被引:946
作者
Horodecki, M [1 ]
Horodecki, P
Horodecki, R
机构
[1] Univ Gdansk, Inst Theoret Phys & Astrophys, PL-80952 Gdansk, Poland
[2] Univ Gdansk, Fac Appl Phys & Math, PL-80952 Gdansk, Poland
关键词
D O I
10.1103/PhysRevLett.80.5239
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
It is shown that if a mixed state can be distilled to the singlet form it must violate partial transposition criterion [A. Peres, Phys. Rev. Lett. 76, 1413 (1996)]. It implies that there are two qualitatively different types of entanglement: "free" entanglement which is distillable, and "bound" entanglement which cannot be brought to the singlet form useful for quantum communication purposes. A possible physical meaning of the result is discussed.
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页码:5239 / 5242
页数:4
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