High Bandwidth Atomic Magnetometery with Continuous Quantum Nondemolition Measurements
High Bandwidth Atomic Magnetometery with Continuous Quantum Nondemolition Measurements
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DOI：
10.1103/physrevlett.104.013601
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发表时间：
2010-01-08
影响因子：
8.6
通讯作者：
Romalis, M. V.
中科院分区：
文献类型：
--
作者：
Shah, V.;Vasilakis, G.;Romalis, M. V.
本文描述了高灵敏度碱金属磁强计中自旋投影噪声的实验研究。我们证明了四倍的改进，使用连续的量子非爆破测量的磁强计的测量带宽。在标量模式下操作，测量体积为2立方厘米，我们实现了22 fr/Hzl/2的磁场灵敏度和1.9 kHz的带宽，自旋极化率仅为1%。我们的实验安排是自然的反作用回避，并可用于实现sub-fT灵敏度与高度极化的自旋压缩原子蒸气。
We describe an experimental study of spin-projection noise in a high sensitivity alkali-metal magnetometer. We demonstrate a fourfold improvement in the measurement bandwidth of the magnetometer using continuous quantum nondemolition measurements. Operating in the scalar mode with a measurement volume of 2 cm3 we achieve magnetic field sensitivity of 22 fr/Hzl/2 and a bandwidth of 1.9 kHz with a spin polarization of only 1%. Our experimental arrangement is naturally backaction evading and can be used to realize sub-fT sensitivity with a highly polarized spin-squeezed atomic vapor.