Entanglement Concentration of Partially Entangled Multi-electron Spin W States with CNOT Gates

被引:0
作者
Bin Gu
Yugai Huang
Xia Fang
Haibin Wang
机构
[1] Nanjing University of Information Science and Technology,Department of Physics
[2] Jiangsu Second Normal University,Jiangsu Engineering Center of Network Monitoring
[3] Nanjing University of Information Science and Technology,undefined
来源
International Journal of Theoretical Physics | 2014年 / 53卷
关键词
Entanglement concentration; Partially entangled state; Multi-electron spin W states; Quantum communication;
D O I
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中图分类号
学科分类号
摘要
We propose a novel entanglement concentration protocol (ECP) for nonlocal N-electron systems in a partially entangled W state, resorting to an ancillary single electron and controlled-not gates. Compared with other ECPs for W states, our ECP has some illustrious advantages. First, each N-electron entangled system can be used to complete the entanglement concentration with only an ancillary electron. It does not require that there are two copies of N-electron entangled systems in each round of entanglement concentration. Second, only one of the users, say Charlie, needs to perform the protocol, while all parties should perform the same operations as Charlie in other ECPs for W-class states. Third, only Charlie asks other parities to retain or discard their electrons, and they do not need to check their measurement results, which greatly simplifies the complication of classical communication. Fourth, our ECP has a higher success probability than other ECPs for W-class states as its success probability equals to the limit value of an ECP for a W state in theory. These advantages maybe make our ECP more useful in practical applications.
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页码:1337 / 1345
页数:8
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共 264 条
  • [1] Knill E.(2001)undefined Nature 409 46-undefined
  • [2] Laflamme R.(2004)undefined Phys. Rev. Lett. 93 17671-undefined
  • [3] Milburn G.J.(2004)undefined Phys. Rev. Lett. 93 661-undefined
  • [4] Nemoto K.(2004)undefined Phys. Rev. A 69 557-undefined
  • [5] Munro W.J.(2013)undefined Phys. Rev. Lett. 110 1829-undefined
  • [6] Beenakker C.W.J.(2013)undefined Laser Phys. Lett. 10 162-undefined
  • [7] DiVincenzo D.P.(2013)undefined Phys. Rev. A 87 4690-undefined
  • [8] Emary C.(2013)undefined Opt. Express 21 3099-undefined
  • [9] Kindermann M.(2013)undefined Phys. Rev. A 88 1913-undefined
  • [10] Long G.L.(2013)undefined Phys. Rev. A 87 942-undefined