Dense coding scheme using superpositions of Bellstates and its NMR implementation

作者：Zhang JF^*; Xie JY; Deng ZW; Lu ZH

来源：Science in China - Series G: Physics Mechanics and Astronomy , 2005, 48(1): 57-67.

DOI：10.1360/04yw0129

• dense coding
• superpositions of Bell-states
• generalized Grover's algorithm
• nuclear magnetic resonance
• quantum computer

Dense coding using superpositions of Bell-states is proposed. The generalized Grover's algorithm is used to prepare the initial entangled states, and the reverse process of the quantum algorithm is used to determine the entangled state in the decoding measurement. Compared with the previous schemes, the superpositions of two Bell-states are exploited. Our scheme is demonstrated using a nuclear magnetic resonance (NMR) quantum computer. The corresponding manipulations are obtained. Experimental results show a good agreement between theory and experiment. We also generalize the scheme to transmit eight messages by introducing an additional two-state system.

• 出版日期2005-2
• 单位北京师范大学; 清华大学