中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1357-1361.doi: 10.1088/1674-1056/18/4/012

• GENERAL • 上一篇    下一篇

Properties on the distant distribution of entanglement for arbitrary two-qubit pure states via noisy quantum channels

王琼, 李际新, 曾浩生   

  1. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,and Department of Physics, Hunan Normal University, Changsha 410081, China
  • 收稿日期:2008-07-19 修回日期:2008-08-24 出版日期:2009-04-20 发布日期:2009-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10775048), the National Fundamental Research Program of China (Grant No 2007CB925204), the Key Project of Chinese Ministry of Education (Grant No 206103), and the Education De

Properties on the distant distribution of entanglement for arbitrary two-qubit pure states via noisy quantum channels

Wang Qiong(王琼), Li Ji-Xin(李际新), and Zeng Hao-Sheng(曾浩生)†   

  1. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,and Department of Physics, Hunan Normal University, Changsha 410081, China
  • Received:2008-07-19 Revised:2008-08-24 Online:2009-04-20 Published:2009-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10775048), the National Fundamental Research Program of China (Grant No 2007CB925204), the Key Project of Chinese Ministry of Education (Grant No 206103), and the Education De

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摘要： This paper investigates the change of entanglement for transmitting an arbitrarily entangled two-qubit pure state via one of three typical kinds of noisy quantum channels: amplitude damping quantum channel, phase damping quantum channel and depolarizing quantum channel. It finds, in all these three cases, that the output distant entanglement (measured by concurrence) reduces proportionately with respect to its initial amount, and the decaying ratio is determined only by the noisy characteristics of quantum channels and independent of the form of initial input state.

Abstract: This paper investigates the change of entanglement for transmitting an arbitrarily entangled two-qubit pure state via one of three typical kinds of noisy quantum channels: amplitude damping quantum channel, phase damping quantum channel and depolarizing quantum channel. It finds, in all these three cases, that the output distant entanglement (measured by concurrence) reduces proportionately with respect to its initial amount, and the decaying ratio is determined only by the noisy characteristics of quantum channels and independent of the form of initial input state.

Key words: entanglement distribution, quantum noisy channel, concurrence

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
03.67.Lx (Quantum computation architectures and implementations) 05.40.Ca (Noise)