Mitigation of time-varying phase errors in a continuously operating cold-atom interferometer using k-reversal technique

Atom interferometry in spatial domain using a continuous atomic beam provides advantages in measurement rate and in measurement of time-varying signals and noise [1, 2]. Time domain control of such spatial-domain atom interferometers provides an error suppression method and can improve the dynamic range. In this work we present experimental results relevant to time-domain control using a k-reversal technique. We demonstrate suppression of magnetic-field-induced phase noise via rapid reversal of the sensitivity axis direction of the interferometer at a rate much higher compared to the inverse interrogation time of the interferometer. In this talk we give an overview of our experimental setup including measurement methodology, simulations, experimental results, and avenues for improvement.

[1] D. S. Durfee, Y. K. Shaham, and M. A. Kasevich, “Long-term stability of an area-reversible atom interferometer sagnac gyroscope,” Phys. Rev. Lett. 97, Dec. 2006. 

[2] J. M. Kwolek and A. T. Black, “Continuous Sub-Doppler-Cooled Atomic Beam Interferometer for Inertial Sensing,” Phys. Rev. Applied 17, p. 024061, Feb. 2022.