Dispersive readout of room-temperature ensemble spin sensors
Dispersive readout of room-temperature ensemble spin sensors
复制标题
DOI：
10.1088/2058-9565/abfaaf
复制
发表时间：
2021-07-01
影响因子：
6.7
通讯作者：
Reinhard, F.
中科院分区：
文献类型：
--
作者：
Ebel, J.;Joas, T.;Reinhard, F.
我们演示了室温下高质量介电微波谐振器中氮空位中心集合自旋的色散读数。自旋态是根据探测谐振器的微波信号的反射相位推断出来的。演示了自旋状态的时间相关跟踪，并用于测量自旋系综的 T (1) 弛豫时间。色散读出提供了固态自旋的微波接口，将自旋信号转换为微波相移。我们估计，由于相位测量可实现高精度，因此其灵敏度可以优于光学读出方案。该方案还适用于光学非活性自旋缺陷，并且是非破坏性的，这使得它对光学读出的几个系统误差不敏感，并且使得能够使用量子反馈。
We demonstrate dispersive readout of the spin of an ensemble of nitrogen-vacancy centers in a high-quality dielectric microwave resonator at room temperature. The spin state is inferred from the reflection phase of a microwave signal probing the resonator. Time-dependent tracking of the spin state is demonstrated, and is employed to measure the T (1) relaxation time of the spin ensemble. Dispersive readout provides a microwave interface to solid state spins, translating a spin signal into a microwave phase shift. We estimate that its sensitivity can outperform optical readout schemes, owing to the high accuracy achievable in a measurement of phase. The scheme is moreover applicable to optically inactive spin defects and it is non-destructive, which renders it insensitive to several systematic errors of optical readout and enables the use of quantum feedback.