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Rotation sensing with improved stability using point source atom interferometry
Physical Review A ( IF 2.9 ) Pub Date : 
Chen Avinadav, Dimitry Yankelev, Moshe Shuker, Ofer Firstenberg, Nir Davidson

Point source atom interferometry is a promising approach for implementing robust, high-sensitivity, rotation sensors using cold atoms. However, its scale factor, , the ratio between the interferometer signal and the actual rotation rate, depends on the initial conditions of the atomic cloud, which may drift in time and result in bias instability, particularly in compact devices with short interrogation times. We present two methods to stabilize the scale factor, one relying on a model-based correction which exploits correlations between multiple features of the interferometer output and works on a single-shot basis, and the other a self-calibrating method where a known bias rotation is applied to every other measurement, requiring no prior knowledge of the underlying model but reducing the sensor bandwidth by a factor of two. We demonstrate both schemes experimentally with complete suppression of scale factor drifts, maintaining the original rotation sensitivity and allowing for bias-free operation over several hours.

中文翻译:

使用点源原子干涉仪提高稳定性的旋转感应

点源原子干涉测量法是一种使用冷原子实现鲁棒,高灵敏度,旋转传感器的有前途的方法。但是,其比例因子干涉仪信号与实际转速之间的比率取决于原子云的初始条件,该条件可能会随时间漂移并导致偏置不稳定,尤其是在询问时间短的紧凑型设备中。我们提出了两种稳定比例因子的方法,一种方法是基于模型的校正方法,该方法利用干涉仪输出的多个特征之间的相关性,并且可以单次运行;另一种方法是采用已知偏差旋转的自校准方法。应用于其他所有测量,不需要先验基础模型,而是将传感器带宽减小两倍。
更新日期:2020-07-09
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