Nuclear spin gyroscope based on an atomic comagnetometer
Nuclear spin gyroscope based on an atomic comagnetometer
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DOI：
10.1103/physrevlett.95.230801
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发表时间：
2005-12-02
影响因子：
8.6
通讯作者：
Romalis, MV
中科院分区：
文献类型：
--
作者：
Kornack, TW;Ghosh, RK;Romalis, MV
我们描述了一种基于碱金属 - 惰性气体共磁强计的核自旋陀螺仪。利用光泵浦碱金属蒸汽使惰性气体原子极化，并检测它们的陀螺进动。在这种装置中，由磁场及其梯度和瞬变引起的自旋进动可以被抵消。通过在无自旋交换弛豫机制下使用高密度碱金属蒸汽，灵敏度得以提高。利用钾 - 氦 - 3共磁强计，我们展示了5×10⁻⁷弧度/秒·赫兹⁻¹/²的旋转灵敏度，相当于2.5飞特斯拉/赫兹¹/²的磁场灵敏度。使用具有较小磁矩的氖 - 21，旋转信号可提高10倍。共磁强计在寻找超出标准模型的反常自旋耦合方面也是一种很有前景的工具。
We describe a nuclear spin gyroscope based on an alkali-metal-noble-gas comagnetometer. Optically pumped alkali-metal vapor is used to polarize the noble-gas atoms and detect their gyroscopic precession. Spin precession due to magnetic fields as well as their gradients and transients can be cancelled in this arrangement. The sensitivity is enhanced by using a high-density alkali-metal vapor in a spin-exchange relaxation free regime. With a K-He-3 comagnetometer we demonstrate rotation sensitivity of 5 x 10(-7) rad s(-1) Hz(-1/2), equivalent to a magnetic field sensitivity of 2.5 fT/Hz(1/2). The rotation signal can be increased by a factor of 10 using Ne-21 with a smaller magnetic moment. The comagnetometer is also a promising tool in searches for anomalous spin couplings beyond the standard model.