论文标题
室温旋转Qubits的色散读数
Dispersive Readout of Room Temperature Spin Qubits
论文作者
论文摘要
我们证明了在室温下高质量介电微波谐振器中氮呈散发中心合奏的旋转的分散读数。自旋态是从微波信号探测谐振器的反射阶段推断出来的。展示了旋转状态的时间依赖性跟踪，并用于测量自旋集合的T1松弛时间。色散读数为固态旋转提供了微波接口，将旋转信号转换为微波相移。我们估计，由于相位测量可以实现的高精度，因此其敏感性可以胜过光学读数方案。此方案此外也适用于光学无效的自旋缺陷，它是无损的，这使其对光学读数的几个系统误差不敏感，并可以使用量子反馈。
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 T1 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.
