Probabilistic quantum relay communication in the noisy channel with analogous space-time code

  • Authors:

  • Jinjing Shi;Ronghua Shi;Ying Guo;Xiaoqi Peng;Moon Ho Lee

  • Affiliations:

  • School of Information Science and Engineering, Central South University, Changsha, China 410083 and Institute of Information and Communication, Chonbuk National University, Chonju, Korea 561-756;School of Information Science and Engineering, Central South University, Changsha, China 410083;School of Information Science and Engineering, Central South University, Changsha, China 410083;Department of Information Science and Engineering, Hunan First Normal University, Changsha, China 410205;Institute of Information and Communication, Chonbuk National University, Chonju, Korea 561-756

  • Venue:
  • Quantum Information Processing
  • Year:
  • 2013

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Abstract

Motivated by the space-time diversity transmission technique in wireless communications, a novel probabilistic quantum relay communication scheme in the quantum noisy channel is proposed in order to maximize the correct information transmission and the range of quantum communication, in which quantum signal sequences that carrying two-particle entangled states are transmitted from two senders to two relays and then retransmitted to the receiver after space-time encoded by relays. The quantum signal states can be restored via filtering out the channel noise with two-dimensional Bell measurements by the receiver. Analysis and discussions indicate that our scheme can increase and approximately double the range of quantum communication while not to reduce too much quantum signal-to-noise ratio, and meanwhile the security can be guaranteed under strongest collective attacks and LOCC attacks.