Efficient controlled-phase gate for single-spin qubits in quantum dots

Article

关键词: ELECTRON-SPIN;   

DOI  :  10.1103/PhysRevB.83.121403

来源: SCIE

【 摘 要 】

Two-qubit interactions are at the heart of quantum information processing. For single-spin qubits in semiconductor quantum dots, the exchange gate has always been considered the natural two-qubit gate. The recent integration of a magnetic field or g-factor gradients in coupled quantum dot systems allows for a one-step, robust realization of the controlled-phase (C-phase) gate instead. We analyze the C-phase gate durations and fidelities that can be obtained under realistic conditions, including the effects of charge and nuclear field fluctuations, and find gate error probabilities of below 10(-4), possibly allowing fault-tolerant quantum computation.

【 授权许可】

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