Chin. Phys. Lett.  2009, Vol. 26 Issue (10): 100304    DOI: 10.1088/0256-307X/26/10/100304
GENERAL |
Quantum Gate Operations in Decoherence-Free Subspace with Superconducting Charge Qubits inside a Cavity
WANG Yi-Min, ZHOU Yan-Li, LIANG Lin-Mei, LI Cheng-Zu
Department of Physics, National University of Defense Technology, Changsha 410073
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WANG Yi-Min, ZHOU Yan-Li, LIANG Lin-Mei et al  2009 Chin. Phys. Lett. 26 100304
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Abstract We propose a feasible scheme to achieve universal quantum gate operations in decoherence-free subspace with superconducting charge qubits placed in a microwave cavity. Single-logic-qubit gates can be realized with cavity assisted interaction, which possesses the advantages of unconventional geometric gate operation. The two-logic-qubit controlled-phase gate between subsystems can be constructed with the help of a variable electrostatic transformer. The collective decoherence can be successfully avoided in our well-designed system. Moreover, GHZ state for logical qubits can also be easily produced in this system.
Keywords: 03.67.Lx      42.50.Pp      85.25.Cp     
Received: 01 April 2009      Published: 27 September 2009
PACS:  03.67.Lx (Quantum computation architectures and implementations)  
  42.50.Pp  
  85.25.Cp (Josephson devices)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/10/100304       OR      https://cpl.iphy.ac.cn/Y2009/V26/I10/100304
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WANG Yi-Min
ZHOU Yan-Li
LIANG Lin-Mei
LI Cheng-Zu
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