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ZTE Communications ›› 2013, Vol. 11 ›› Issue (3): 46-50.DOI: DOI:10.3969/j.issn.1673-5188.2013.03.008

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Optimal Rate for Constant-Fidelity Entanglement in Quantum Communication Networks

Youxun Cai, Xutao Yu, and Yang Cao   

  1. State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
  • Received:2013-07-25 Online:2013-09-25 Published:2013-09-25
  • About author:Youxun Cai (220110558@seu.edu.cn) is an postgraduate student at the State Key Laboratory of Millimeter Waves, Southeast University. His current research focus is quantum information theory and quantum wireless networks.

    Xutao Yu (yuxutao@seu.edu.cn) is an associate professor at the State Key Laboratory of Millimeter Waves, Southeast University. Her research interests include wireless network protocols and quantum communication network protocols.

    Yang Cao (220110559@seu.edu.cn) is an postgraduate student at the State Key Laboratory of Millimeter Waves, Southeast University. His research interests include wireless communication and quantum computation.

Optimal Rate for Constant-Fidelity Entanglement in Quantum Communication Networks

Youxun Cai, Xutao Yu, and Yang Cao   

  1. State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
  • 作者简介:Youxun Cai (220110558@seu.edu.cn) is an postgraduate student at the State Key Laboratory of Millimeter Waves, Southeast University. His current research focus is quantum information theory and quantum wireless networks.

    Xutao Yu (yuxutao@seu.edu.cn) is an associate professor at the State Key Laboratory of Millimeter Waves, Southeast University. Her research interests include wireless network protocols and quantum communication network protocols.

    Yang Cao (220110559@seu.edu.cn) is an postgraduate student at the State Key Laboratory of Millimeter Waves, Southeast University. His research interests include wireless communication and quantum computation.

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Abstract: In this paper, we propose an entanglement scheme for long-distance, constant-fidelity communication in quantum networks. We discuss the optimal rate of entanglement that allows for constant fidelity in both elementary and multihop links. We also discuss time complexity and propose the mathematical order of the rate capacity for an entanglement scheme. We propose a recursive entanglement scheme, a simultaneous entanglement scheme, and an adjacent entanglement scheme mathematically analyze these schemes. The rate capacity of the recursive and simultaneous entanglement schemes is Ω(1/en ), but the adjacent entanglement scheme performs better, providing a rate of Ω(1/n ).

Key words: rate capacity, constant fidelity, entanglement scheme, ad hoc quantum networks

摘要： In this paper, we propose an entanglement scheme for long-distance, constant-fidelity communication in quantum networks. We discuss the optimal rate of entanglement that allows for constant fidelity in both elementary and multihop links. We also discuss time complexity and propose the mathematical order of the rate capacity for an entanglement scheme. We propose a recursive entanglement scheme, a simultaneous entanglement scheme, and an adjacent entanglement scheme mathematically analyze these schemes. The rate capacity of the recursive and simultaneous entanglement schemes is Ω(1/en ), but the adjacent entanglement scheme performs better, providing a rate of Ω(1/n ).

关键词: rate capacity, constant fidelity, entanglement scheme, ad hoc quantum networks