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Electrical control of coherent spin rotation of a single-spin qubit
npj Quantum Information ( IF 6.6 ) Pub Date : 2020-09-08 , DOI: 10.1038/s41534-020-00308-8
Xiaoche Wang , Yuxuan Xiao , Chuanpu Liu , Eric Lee-Wong , Nathan J. McLaughlin , Hanfeng Wang , Mingzhong Wu , Hailong Wang , Eric E. Fullerton , Chunhui Rita Du

Nitrogen vacancy (NV) centers, optically active atomic defects in diamond, have attracted tremendous interest for quantum sensing, network, and computing applications due to their excellent quantum coherence and remarkable versatility in a real, ambient environment. One of the critical challenges to develop NV-based quantum operation platforms results from the difficulty in locally addressing the quantum spin states of individual NV spins in a scalable, energy-efficient manner. Here, we report electrical control of the coherent spin rotation rate of a single-spin qubit in NV-magnet based hybrid quantum systems. By utilizing electrically generated spin currents, we are able to achieve efficient tuning of magnetic damping and the amplitude of the dipole fields generated by a micrometer-sized resonant magnet, enabling electrical control of the Rabi oscillation frequency of NV spins. Our results highlight the potential of NV centers in designing functional hybrid solid-state systems for next-generation quantum-information technologies. The demonstrated coupling between the NV centers and the propagating spin waves harbored by a magnetic insulator further points to the possibility to establish macroscale entanglement between distant spin qubits.



中文翻译:

单旋量子位相干自旋旋转的电气控制

氮空位(NV)中心,金刚石中的光学活性原子缺陷,由于在现实的周围环境中具有出色的量子相干性和出色的多功能性,因此在量子感测,网络和计算应用中引起了极大的兴趣。开发基于NV的量子操作平台的关键挑战之一是难以以可扩展的,高能效的方式局部解决单个NV自旋的量子自旋状态。在这里,我们报告基于NV磁体的混合量子系统中单旋量子位的相干自旋旋转速率的电控制。通过利用电产生的自旋电流,我们能够实现磁阻尼和微米级谐振磁体产生的偶极子场振幅的有效调整,可以对NV自旋的Rabi振荡频率进行电气控制。我们的研究结果凸显了NV中心在为下一代量子信息技术设计功能性混合固态系统方面的潜力。NV中心和由磁性绝缘体掩藏的正在传播的自旋波之间的已证明耦合,进一步指出了在远距离自旋量子位之间建立宏观纠缠的可能性。

更新日期:2020-09-09
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