论文标题
具有优化探测的敏感BEC磁力测定法
Sensitive BEC magnetometry with optimized probing
论文作者
论文摘要
使用$^{87} $ rb原子的纺纱玻璃纤维冷凝物的改进的空间磁力计已实现，利用新开发的两极化阶段对比成像。通过仔细选择探针参数来抑制光学射击噪声。我们在28 $ {\ rmμm^{2}} $的测量区域上达到了7.7 $ {\ rm pt/\ sqrt {hz}} $的DC磁场灵敏度。对于具有微米级空间分辨率的其他现代低频磁力仪，所达到的每个单位面积的灵敏度优于该敏感性。该结果是实现超过经典方法的量子增强磁力测定法的一个有希望的步骤。
An improved spatial magnetometer using a spinor Bose-Einstein condensate of $^{87}$Rb atoms is realized utilizing newly developed two-polarization phase contrast imaging. The optical shot noise is suppressed by carefully choosing the probe parameters. We attain a dc-magnetic field sensitivity of 7.7 ${\rm pT/\sqrt{Hz}}$ over a measurement area of 28 ${\rm μm^{2}}$. The attained sensitivity per unit area is superior to that for other modern low-frequency magnetometers with micrometer-order spatial resolution. This result is a promising step for realizing quantum-enhanced magnetometry surpassing classical methods.
