Robust Quantum Computing in Decoherence-Free Subspaces with Double-Dot Spin Qubits

We present a scheme for implementing robust quantum gates in decoherence-free subspaces （DFSs） with double-dot spin qubits. Through the resonator-assisted interaction, the controllable interqubit couplings can be achieved only by adjusting the qubit transition frequencies. We construct a set of logi...

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Bibliographic Details
Published inCommunications in theoretical physics Vol. 61; no. 2; pp. 181 - 186
Main Author 冯志波 张春丽 周运清
Format Journal Article
LanguageEnglish
Published 01.02.2014
Subjects
Couplings
Gates
Noise
Proposals
Quantum computing
Qubits (quantum computing)
Stability
Subspaces
子空间
消相干
相互作用
自旋
跃迁频率
逻辑门电路
量子比特
量子计算
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ISSN0253-6102
1572-9494
DOI10.1088/0253-6102/61/2/06

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Summary:We present a scheme for implementing robust quantum gates in decoherence-free subspaces （DFSs） with double-dot spin qubits. Through the resonator-assisted interaction, the controllable interqubit couplings can be achieved only by adjusting the qubit transition frequencies. We construct a set of logic gates on the DFS-encoded qubits to eliminate the collective noise effects, and thus the gate fidelities can be enhanced remarkably. This proposal may offer a potential approach to realize the robust quantum computing with spin qubits.
Bibliography:decoherence-free subspace, double-dot spin qubit, transmission line resonator
11-2592/O3
We present a scheme for implementing robust quantum gates in decoherence-free subspaces （DFSs） with double-dot spin qubits. Through the resonator-assisted interaction, the controllable interqubit couplings can be achieved only by adjusting the qubit transition frequencies. We construct a set of logic gates on the DFS-encoded qubits to eliminate the collective noise effects, and thus the gate fidelities can be enhanced remarkably. This proposal may offer a potential approach to realize the robust quantum computing with spin qubits.
FENG Zhi-Bo, ZHANG Chun-Li and ZHOU Yun-Qing （1School of Electric Engineering, Xuchang University, Xuchang 461000, China 2Department of Physics, Zhejiang Ocean University, Zhoushan 316000, China）
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ISSN:0253-6102
1572-9494
DOI:10.1088/0253-6102/61/2/06