Computer Science ›› 2014, Vol. 41 ›› Issue (12): 53-56.doi: 10.11896/j.issn.1002-137X.2014.12.012

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Controlled Dense Coding Using Non-symmetric Channel between Multi-parties

ZHANG Cheng-xian,GUO Bang-hong,CHENG Guang-ming,GUO Jian-jun and LIU Song-hao   

  • Online:2018-11-14 Published:2018-11-14

Abstract: A scheme of controlled dense coding was proposed by using multi-parties in non-symmetric and high dimensional quantum channel.The quantum channel and the amount of the classic information of dense coding are controlled with the method of quantum measurement.By performing some unitary operations and some orthogonal quantum mea-surements on the quantum state,the quantum channel is purified.Thus,controlled dense coding is realized with some probability.It solves the extraction of the maximally quantum state in the case of decoherence in the practical quantum channel.It is successful to control dense coding between the N senders and the receiver and the efficiency of controlled dense coding is improved.

Key words: Controlled dense coding,Non-symmetric channel,Entangled state,Von neumann measurement,Amount of information,Unitary transformation

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