Quantum Gate Operations in Decoherence-Free Subspace with Superconducting Charge Qubits inside a Cavity

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 geometri...

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Bibliographic Details
Published inChinese physics letters Vol. 26; no. 10; p. 100304
Main Authors Wang, Yi-Min, Zhou, Yan-Li, Liang, Lin-Mei, Li, Cheng-Zu
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.10.2009
Subjects
Charge
Electrostatics
Gates
Holes
Microwaves
Qubits (quantum computing)
Subspaces
Superconductivity
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Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/26/10/100304