Entanglement Distillation for Mixed States Using Particle Statistics
HUANG Xiao-Li1 , CHENG Li-Hong2 , YI Xue-Xi1
1 Department of Physics, Dalian University of Technology, Dalian 116024
2 Department of Physics, Dalian Maritime University, Dalian 116026
Entanglement Distillation for Mixed States Using Particle Statistics
HUANG Xiao-Li1 ;CHENG Li-Hong2 ;YI Xue-Xi1
1 Department of Physics, Dalian University of Technology, Dalian 116024
2 Department of Physics, Dalian Maritime University, Dalian 116026
关键词 ：
03.67.-a ,
03.65.Ud ,
05.30.-d
Abstract ： We extend the idea of entanglement concentration protocol for pure states (Phys. Rev. Lett. 88, 187903) to the case of entanglement distillation for mixed states. The scheme works only with particle statistics and local operations, without the need of any other interactions. We show that the maximally entangled state can be distilled out when the initial state is pure, otherwise the entanglement distilled depends on the off-diagonal element of density matrix of the initial state. Because of the requirement for density matrix, the entanglement distilled is always less than one, and this result is the same for both fermionic and bosonic particles. The distillation efficiency is a product of the diagonal elements of the initial state, it takes the maximum 50%, the same as that in the case for pure states.
Key words ：
03.67.-a
03.65.Ud
05.30.-d
出版日期: 2006-04-01
:
03.67.-a
(Quantum information)
03.65.Ud
(Entanglement and quantum nonlocality)
05.30.-d
(Quantum statistical mechanics)
引用本文:
HUANG Xiao-Li;CHENG Li-Hong;YI Xue-Xi. Entanglement Distillation for Mixed States Using Particle Statistics[J]. 中国物理快报, 2006, 23(4): 772-774.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2006/V23/I4/772
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2006, Vol. 23 
