论文标题
用磁性断层扫描映射单电子旋转
Mapping single electron spins with magnetic tomography
论文作者
论文摘要
映射单电子旋转的位置是用于纳米级磁共振成像和量子网络表征等应用的高度期望的能力。在这里，我们演示了一种基于旋转外部磁场的方法，以识别单个电子自旋在量子自旋传感器附近的精确位置。我们在钻石中使用氮气散布中心作为量子传感器，并通过改变磁场矢量来调节偶尔偶联到晶体中的近距离电子自旋。偶极耦合的调制包含有关自旋坐标的信息，我们从中提取其位置，不确定性为0.9 \，Å。我们表明该方法可用于定位距传感器最高10 \，nm的纳米精度的电子旋转。我们讨论了该方法适用于绘制超精细耦合电子旋转的适用性，并证明它可以应用于定位氮氧化物自由基。磁性断层扫描方法可用于研究单个分子的结构。
Mapping the positions of single electron spins is a highly desired capability for applications such as nanoscale magnetic resonance imaging and quantum network characterization. Here, we demonstrate a method based on rotating an external magnetic field to identify the precise location of single electron spins in the vicinity of a quantum spin sensor. We use a nitrogen-vacancy center in diamond as a quantum sensor and modulate the dipolar coupling to a proximate electron spin in the crystal by varying the magnetic field vector. The modulation of the dipolar coupling contains information on the coordinates of the spin, from which we extract its position with an uncertainty of 0.9\,Å. We show that the method can be used to locate electron spins with nanometer precision up to 10\,nm away from the sensor. We discuss the method's applicability to mapping hyperfine coupled electron spins, and show it may be applied to locating nitroxide radicals. The magnetic tomography method can be utilized for distance measurements for studying the structure of individual molecules.
