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An Efficient Scheme for Implementing an N-Qubit Toffoli Gate with Superconducting Quantum-Interference Devices in Cavity QED |
| ZHENG An-Shou1;LIU Ji-Bing2;XIANG Dong1;LIU Cui-Lan1;YUAN Hong1 |
| 1College of Mathematics and Physics, China University of Geosciences, Wuhan 4300742Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Cite this article: |
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ZHENG An-Shou, LIU Ji-Bing, XIANG Dong et al 2007 Chin. Phys. Lett. 24 2489-2492 |
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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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Received: 31 May 2007
Published: 16 August 2007
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| PACS: |
03.67.Lx
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(Quantum computation architectures and implementations)
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81.25.Dq
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42.50.Dv
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(Quantum state engineering and measurements)
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