Increasing singlet fraction with entanglement swapping

被引：28
作者：
Modlawska, Joanna [1 ]
Grudka, Andrzej [1 ,2 ,3 ]
机构：
[1] Adam Mickiewicz Univ, Fac Phys, PL-61614 Poznan, Poland
[2] Univ Gdansk, Inst Theoret Phys & Astrophys, PL-80952 Gdansk, Poland
[3] Natl Quantum Informat Ctr Gdansk, PL-81824 Sopot, Poland
来源：
PHYSICAL REVIEW A | 2008年 / 78卷 / 03期
关键词：
D O I：
10.1103/PhysRevA.78.032321
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We consider entanglement swapping for certain mixed states. We assume that the initial states have the same singlet fraction and show that the final state can have a singlet fraction greater than that of the initial states. We also consider two subsequent teleportations and show that entanglement swapping can increase teleportation fidelity. Finally, we show how this effect can be demonstrated with linear optics.
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页数：5
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