中国物理B ›› 2009, Vol. 18 ›› Issue (9): 3710-3713.doi: 10.1088/1674-1056/18/9/017

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Faithful quantum entanglement sharing based on linear optics with additional qubits

邓富国1, 李熙涵2, 段晓礁2, 盛宇波2, 周宏余2   

  1. (1)The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China; Beijing Radiation Center, Beijing 100875, China;Department of Physics, Applied Optics Beijing Area Major Laborato; (2)The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China;Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal Univers
  • 收稿日期:2008-12-10 修回日期:2009-01-08 出版日期:2009-09-20 发布日期:2009-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10604008), Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No 200723), and Beijing Natural Science Foundation (Grant No 1082008).

Faithful quantum entanglement sharing based on linear optics with additional qubits

Li Xi-Han(李熙涵)a)b)c), Duan Xiao-Jiao(段晓礁)a)b)c), Sheng Yu-Bo(盛宇波)a)b)c), Zhou Hong-Yu(周宏余)a)b)c), and Deng Fu-Guo(邓富国)a)c)d)†   

  1. a The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China; b Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, Chinac Beijing Radiation Center, Beijing 100875, Chinad Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China
  • Received:2008-12-10 Revised:2009-01-08 Online:2009-09-20 Published:2009-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10604008), Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No 200723), and Beijing Natural Science Foundation (Grant No 1082008).

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摘要： This paper presents a scheme for faithfully distributing a pure entanglement between two parties over an arbitrary collective-noise channel with linear optics. The transmission is assisted by an additional qubit against collective noise. The receiver can take advantage of the time discrimination and the measurement results of the assistant qubit to reconstruct a pure entanglement with the sender. Although the scheme succeeds probabilistically, the resource used to get a pure entanglement state is finite, and so is easier to establish entanglement in practice than quantum entanglement purification.

Abstract: This paper presents a scheme for faithfully distributing a pure entanglement between two parties over an arbitrary collective-noise channel with linear optics. The transmission is assisted by an additional qubit against collective noise. The receiver can take advantage of the time discrimination and the measurement results of the assistant qubit to reconstruct a pure entanglement with the sender. Although the scheme succeeds probabilistically, the resource used to get a pure entanglement state is finite, and so is easier to establish entanglement in practice than quantum entanglement purification.

Key words: entanglement sharing, quantum communication, linear optics

中图分类号:  (Quantum communication)

  • 03.67.Hk
03.67.Lx (Quantum computation architectures and implementations)