论文标题
钻石中具有两旋链系统的概率磁力测定法
Probabilistic magnetometry with two-spin system in diamond
论文作者
论文摘要
钻石中的氮呈现中心（如纳米级空间分辨率的量子传感）至关重要。基本协议是拉姆西序列，它将外部静态磁场的印记到量子传感器的相位，然后读出。在这项工作中，我们表明，可以使用氮呈斑和附近碳13之间的超精细耦合来设置截面方案，从而在现实的实验条件下提高灵敏度。我们发现，对于同位素纯化的样品，可以在低温温度（$ 4 $ k）和$ 0.1 $ $ $ $ $ $ $ $ $ $ $ $ $ $^{ - 1/2} $的敏感性下，可以实现$ $ t范围中弱磁场的检测。
Solid-state magnetometers like the Nitrogen-Vacancy center in diamond have been of paramount importance for the development of quantum sensing with nanoscale spatial resolution. The basic protocol is a Ramsey sequence, that imprints an external static magnetic field into phase of the quantum sensor, which is subsequently readout. In this work we show that the hyperfine coupling between the Nitrogen-Vacancy and a nearby Carbon-13 can be used to set a post-selection protocol that leads to an enhancement of the sensitivity under realistic experimental conditions. We found that for an isotopically purified sample the detection of weak magnetic fields in the $μ$T range can be achieved with a sensitivity of few nTHz$^{-1/2}$ at cryogenic temperature ($4$ K), and $0.1$ $μ$THz$^{-1/2}$ at room temperature.
