Purifying entanglement of noisy two-qubit states via entanglement swapping

被引：17
作者：
Song, Wei [1 ]
Yang, Ming [2 ]
Cao, Zhuo-Liang [1 ]
机构：
[1] Hefei Normal Univ, Sch Elect & Informat Engn, Hefei 230601, Peoples R China
[2] Anhui Univ, Sch Phys & Mat Sci, Hefei 230601, Peoples R China
来源：
PHYSICAL REVIEW A | 2014年 / 89卷 / 01期
基金：
中国国家自然科学基金;
关键词：
PURIFICATION;
D O I：
10.1103/PhysRevA.89.014303
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Two qubits in pure entangled states going through separate paths and interacting with their own individual environments will gradually lose their entanglement. Here we show that the entanglement change of a two-qubit state due to amplitude damping noises can be recovered by entanglement swapping. Some initial states can be asymptotically purified into maximally entangled states by iteratively using our protocol.
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页数：5
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