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Implementation of a multiple round quantum dense coding using nuclear magnetic resonance |
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| Authors: | |
| Institution: | 1. Key Laboratory For Quantum Information and Measurements of MOE, Department of Physics, Tsinghua University, Beijing 100084, China 2. Department of Materials Science and Engineering, Beijing Normal University, Beijing 100875, China 3. Testing and Analytical Center,Beijing Normal University,Beijing,100875,China 4. Department of Physics,Beijing Normal University,Beijing,100875,China 5. Key Laboratory For Quantum Information and Measurements of MOE, Department of Physics, Tsinghua University, Beijing 100084, China;Key Lablratory For Atomic and Molecular Nanosciences,Tsinghua University,Beijing,100084,China |
| 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 an m + 1 qubit system, Bob can transmit one of 2m+1 messages to Alice, through manipulating only one qubit and exchanging it between Alice and Bob for m rounds. The information capacity is enhanced to m + 1 bits as compared to m 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. |
| Keywords: | quantum dense coding multiple round nuclear magnetic resorance |
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