In situ magnetometry for experiments with atomic quantum gases.
In situ magnetometry for experiments with atomic quantum gases.
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用于原子量子气体实验的原位磁力测量。
DOI：
10.1063/1.5003646
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
D. Schneble
中科院分区：
文献类型：
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作者：
L. Krinner;M. Stewart;Arturo Pazmino;D. Schneble
磁场的精确控制是原子量子气体实验中经常遇到的挑战。在这里，我们提出了一种对磁场进行原位监测的简单方法，该方法可以很容易地在任何无法使用专用场稳定方法的量子气体设备中实现。该方法的工作原理是对磁场敏感的内部状态之间的几个拉比共振进行采样，这些内部状态在给定的实验中不会使用，可以与任意场的标准测量序列集成。对于 87Rb 原子凝聚体，我们演示了高斯级偏置场的重建，精度可达数十微高斯，时间分辨率为毫秒。我们通过测量磁场敏感跃迁上的慢共振拉比振荡来测试该方法的性能，并给出了在状态选择性光学势实验中使用该方法的示例。
Precise control of magnetic fields is a frequent challenge encountered in experiments with atomic quantum gases. Here we present a simple method for performing in situ monitoring of magnetic fields that can readily be implemented in any quantum-gas apparatus in which a dedicated field-stabilization approach is not feasible. The method, which works by sampling several Rabi resonances between magnetically field sensitive internal states that are not otherwise used in a given experiment, can be integrated with standard measurement sequences at arbitrary fields. For a condensate of 87Rb atoms, we demonstrate the reconstruction of Gauss-level bias fields with an accuracy of tens of microgauss and with millisecond time resolution. We test the performance of the method using measurements of slow resonant Rabi oscillations on a magnetic-field sensitive transition and give an example for its use in experiments with state-selective optical potentials.