摘要
Three kinds of quantum relay communication models are proposed,i.e.,the quantum single relay model,quantum serial multi-relay model and quantum parallel multi-relay model.The channel capacities of those three kinds of systems are analyzed with the theory of quantum Markov trace-preserving process and the generalized theory of simple multi-hop channel in quantum system.Motivated by the quantum Fano inequality,the lower bounds of that channel capacities are derived.The illustration and simulation present the trends of the lower bounds on the channel capacities of different quantum relay systems based on the depolarizing noisy channel.
基金
Supported by the National Natural Science Foundation of China under Grant No.60902044
the Program for New Century Excellent Talents in University of Ministry of Education of China(NCET-11-0510)
the Hunan Provincial Innovation Foundation For Postgraduate under Grant No.CX2011B087
the State Scholarship Fund organized by the China Scholarship Council under Grant No.2011637096
Excellent Doctoral Dissertation Fund of Central South University under Grant No.2011ybjz030
WCU R32-2010-000-20014-0(Korea)
FR 2010-0020942(Korea)
MEST 2012-002521(NRF Korea)
