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Resonantly Driven Singlet-Triplet Spin Qubit in Silicon
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-03-20 , DOI: 10.1103/physrevlett.124.117701 K. Takeda , A. Noiri , J. Yoneda , T. Nakajima , S. Tarucha
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-03-20 , DOI: 10.1103/physrevlett.124.117701 K. Takeda , A. Noiri , J. Yoneda , T. Nakajima , S. Tarucha
We report implementation of a resonantly driven singlet-triplet spin qubit in silicon. The qubit is defined by the two-electron antiparallel spin states and universal quantum control is provided through a resonant drive of the exchange interaction at the qubit frequency. The qubit exhibits long exceeding that is limited by dephasing due to the nuclei rather than charge noise thanks to the symmetric operation and a large micromagnet Zeeman field gradient. The randomized benchmarking shows 99.6% single gate fidelity which is the highest reported for singlet-triplet qubits.
中文翻译:
硅中共振驱动的单重态-三重自旋量子位
我们报告了在硅中谐振驱动的单重态-三重态自旋量子位的实现。量子位由双电子反平行自旋态定义,并且通过以量子位频率共振交换相互作用来提供通用量子控制。量子比特展长 超过 由于受到相移的限制 由于对称操作和大的微磁体塞曼磁场梯度,核而不是电荷噪声。随机基准测试显示99.6%的单门保真度,这是单线三重态qubit的最高记录。
更新日期:2020-03-21
中文翻译:
硅中共振驱动的单重态-三重自旋量子位
我们报告了在硅中谐振驱动的单重态-三重态自旋量子位的实现。量子位由双电子反平行自旋态定义,并且通过以量子位频率共振交换相互作用来提供通用量子控制。量子比特展长 超过 由于受到相移的限制 由于对称操作和大的微磁体塞曼磁场梯度,核而不是电荷噪声。随机基准测试显示99.6%的单门保真度,这是单线三重态qubit的最高记录。