| An Efficient Scheme for Implementing an N-Qubit Toffoli Gate with Superconducting Quantum-Interference Devices in Cavity QED |
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| 作者姓名： | 郑安寿 刘继兵 向东 刘翠兰 袁红 |
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| 作者单位： | [1]College of Mathematics and Physics, China University of Geosciences, Wuhan 430074 [2]Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| 基金项目： | Supported in part by the National Natural Science Foundation of China under Grant Nos 10575040 and 90503010, and the Research Foundation for 0utstanding Young Teachers, China University of Geosciences （Wuhan） under Grant No CUGQNL0717.
We would like to thank Professor WU Ying for helpful discussion. |
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| 摘 要： | An alternative approach is proposed to realize an n-qubit Toffoli gate with superconducting quantum-interference devices （SQUIDs） in cavity quantum electrodynamics （QED）. In the proposal, we represent two logical gates of a qubit with the two lowest levels of a SQUID while a higher-energy intermediate level of each SQUID is utilized for the gate manipulation. During the operating process, because the cavity field is always in vacuum state, the requirement on the cavity is greatly loosened and there is no transfer of quantum information between the cavity and SQUIDs.
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| 关 键 词： | 超导电技术 量子 QED 空腔 干涉技术 |
| 收稿时间： | 2007-5-31 |
| 修稿时间： | 2007-05-31 |
An Efficient Scheme for Implementing an N-Qubit Toffoli Gate with Superconducting Quantum-Interference Devices in Cavity QED |
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| ZHENG An-Shou,LIU Ji-Bing,XIANG Dong,LIU Cui-Lan,YUAN Hong.An Efficient Scheme for Implementing an N-Qubit Toffoli Gate with Superconducting Quantum-Interference Devices in Cavity QED[J].Chinese Physics Letters,2007,24(9):2489-2492. |
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| Authors: | ZHENG An-Shou LIU Ji-Bing XIANG Dong LIU Cui-Lan YUAN Hong |
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| Affiliation: | 1 College of Mathematics and Physics, China University of Geosciences, Wuhan 430074 ; 2 Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Abstract: | An alternative approach is proposed to realize an n-qubit Toffoli gate with superconducting quantum-interference devices (SQUIDs) in cavity quantum electrodynamics (QED). In the proposal, we represent two logical gates of a qubit with the two lowest levels of a SQUID while a higher-energy intermediate level of each SQUID is utilized for the gate manipulation. During the operating process, because the cavity field is always in vacuum state, the requirement on the cavity is greatly loosened and there is no transfer of quantum information between the cavity and SQUIDs. |
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| Keywords: | 03 67 Lx 81 25 Dq 42 50 Dv |
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