标题： 自旋压缩矢量原子磁强计 显示英文标题

标题： Spin-squeezed vector atomic magnetometry

摘要： 基于塞曼位移测量的原子磁力计具有高灵敏度和长期稳定性的潜力。 与其他原子传感器包括原子钟和原子干涉仪一样，原子磁力计原则上可以通过自旋压缩进一步提高灵敏度。 然而，现有的原子磁力计与自旋压缩不兼容，因为在操作过程中原子很难处于纯量子态。 一个自然的挑战是磁场的方向是任意的。 在本文中，我们提出了一种基于冷原子的带有自旋压缩的磁力计，可以测量任意磁场的大小和方向。 对于实验上可实现的参数，我们表明上述技术可以实现比现有最佳磁力计高近三个数量级的灵敏度。 显示英文摘要

摘要： Atomic magnetometers based on Zeeman shift measurement have the potential for high sensitivity and long-term stability. Like other atomic sensors including atomic clocks and atom interferometers, the atomic magnetometer could in principle be augmented with spin squeezing for further sensitivity enhancement. However, existing atomic magnetometers are not compatible with spin squeezing because the atoms can hardly be in a pure quantum state during operation. A natural challenge is the arbitrary direction of the magnetic field. In this paper, we propose a cold-atom-based magnetometer with spin squeezing that can measure both the magnitude and the direction of an arbitrary magnetic field. For experimentally accessible parameters, we show that the technique described above could achieve a sensitivity nearly three orders of magnitude higher than that of the best existing magnetometers.