Arbitrary Partially Entangled Three-Electron W State Concentration with Controlled-Not Gates
SHENG Yu-Bo1** , FENG Zhao-Feng1 , OU-YANG Yang1 , QU Chang-Cheng1 , ZHOU Lan1,2
1 Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Nanjing 2100032 College of Mathematics and Physics, Nanjing University of Posts and Telecommunications, Nanjing 210003
Abstract ：We describe an efficient entanglement concentration protocol (ECP) for an arbitrary partially entangled three-electron W state. We show that with the help of two ancillary single electrons, the concentration task can be well completed. This ECP has several advantages: Firstly, we only require one pair of partially entangled states. Secondly, only two single electrons are used during the whole protocol. Thirdly, we do not require all the parties to participate in the whole process, and only two parties are needed to perform the operation. Fourthly, the protocol can be repeated to obtain a high success probability. This ECP may be useful in current quantum computation and quantum communication.
出版日期: 2014-04-24
:
03.67.Pp
(Quantum error correction and other methods for protection against decoherence)
03.67.Hk
(Quantum communication)
03.65.Ud
(Entanglement and quantum nonlocality)
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2014, Vol. 31 
