Controlled dense coding using three-particle in the non-symmetric quantum state

Abstract

Abstract: A scheme of controlled dense coding is proposed by using non-symmetric quantum channel in dimensional entangled state. The collapse of the state and the entanglement between Alice and Bob are controlled by Charlie’s local measurement on his particle in two dimension. Then the dimensional non-symmetric quantum channel is controlled. It can be seen that the average amount of transmitted information of dense coding is controlled by Charlie’s measurement angle. One can find that the average amount of information is more than 2 bits by using maximally entangled state in the non-symmetric quantum channel. Thus, this scheme is high-efficiency. In the case the entanglement is non-maximally, the transmitted information is determined by the measurement angle and the coefficient of the entangled state.

Key words: quantum information, dense coding, non-symmetric channel, control, amount of information, unitary transformation

CLC Number:

O413

ZHANG Cheng-xian, GUO Bang-hong, CHENG Guang-ming, GUO Jian-jun,F AN Rong-hua, ZHANG Zhi-ming, LIU Song-hao. Controlled dense coding using three-particle in the non-symmetric quantum state [J]. J4, 2014, 31(3): 305-311.

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