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Scheme for Generating Cluster States with Charge Qubits in a Cavity |
| SONG Ke-Hui |
| Department of Physics Science and Information Engineering, Huaihua University, Huaihua 418008 |
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SONG Ke-Hui 2009 Chin. Phys. Lett. 26 120302 |
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Abstract Based on superconducting charge qubits (SCCQs) coupled to a single-mode microwave cavity, we propose a scheme for generating charge cluster states. For all SCCQs, the controlled gate voltages are all in their degeneracy points, the quantum information is encoded in two logic states of charge basis. The generation of the multi-qubit cluster state can be achieved step by step on a pair of nearest-neighbor qubits. Considering effective long-rang coupling, we provide an efficient way to one-step generating of a highly entangled cluster state, in which the qubit-qubit coupling is mediated by the cavity mode. Our quantum operations are insensitive to the initial state of the cavity mode by removing the influence of the cavity mode via the periodical evolution of the system. Thus, our operation may be against the decoherence from the cavity.
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03.67.Mn
42.50.Dv
03.65.Ud
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Received: 03 July 2009
Published: 27 November 2009
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| PACS: |
03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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42.50.Dv
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(Quantum state engineering and measurements)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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