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Deterministic Polarization Entanglement Purification of χ-type entangled states in Multiple Degrees of Freedom
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  • 作者：Ronghua Shi ; Shaorong Liu ; Shuo Wang…
  • 关键词：Entanglement purification ; χ ; type entangled states ; Spatial entanglement ; Frequency entanglement ; 03.67.Dd ; 03.65.Ud
  • 刊名：International Journal of Theoretical Physics
  • 出版年：2015
  • 出版时间：February 2015
  • 年：2015
  • 卷：54
  • 期：2
  • 页码：358-367
  • 全文大小：316 KB
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  • 刊物类别：Physics and Astronomy
  • 刊物主题：Physics
    Physics
    Quantum Physics
    Elementary Particles and Quantum Field Theory
    Mathematical and Computational Physics
  • 出版者：Springer Netherlands
  • ISSN：1572-9575
文摘
We present two deterministic entanglement purifications protocols for χ-type entangled states, resorting to multiple degrees of freedom. One protocol is implemented with the spatial entanglement to distill the maximally entangled states from the mixed states, resorting to some linear optical elements. Another one is implemented with the frequency entanglement for the purification. All the parties can jointly distill the maximally entangled states from the mixed states affected by the environmental noise during transmission. Both of the protocols can work in a deterministic way with the success probability 100 %, in principle. The derived features may make the protocols useful in the practical long-distance quantum communication.

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