Implementation of a multiple round quantum dense coding using nuclear magnetic resonance |
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| Authors: | Zhang Jingfu Xie Jingyi Wang Chuan Deng Zhiwei Lu Zhiheng and Long Guilu |
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| Institution: | (1) Key Laboratory For Quantum Information and Measurements of MOE, Department of Physics, Tsinghua University, 100084 Beijing, China;(2) Department of Materials science and Engineering, Beijing Normal University, 100875 Beijing, China;(3) Testing and Analytical Center, Beijing Normal University, 100875 Beijing, China;(4) Department of Physics, Beijing Normal University, 100875 Beijing, China;(5) Key Laboratory For Atomic and Molecular Nanosciences, Tsinghua University, 100084 Beijing, China |
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| Abstract: | A multiple round quantum dense coding scheme based on the quantum phase estimation algorithm is proposed and implemented in
a three qubit nuclear magnetic resonance (NMR) quantum computer. Using anm+1 qubit system, Bod can transmit one of 2
m+1 messages to Alice, through manipulating only one qubit and exchanging it between Alice and Bob form rounds. The information capacity is enhanced tom+1 bits as compared tom bits in a classical scheme. The scheme has been demonstrated in NMR system, and the experimental results show a good agreement
between theory and experiment. |
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| Keywords: | quantum dense coding multiple round nuclear magnetic resorance |
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