Characterizing the impact of the magnetic field in the frequency domain for a multiwave atom interferometer

We implement a magnetic -field -sensitive multiwave atom Ramsey interferometer based on radio -frequency (RF) field -coupled Zeeman states, and we theoretically derive and experimentally measure its frequency -domain transfer function with low-pass filtering characteristics. In addition, we investigate a potential application scheme of the transfer functions for interference fringe recovery. As the measurements involve the ac magnetic field, a Raman spectrum -based solution is implemented to calibrate the actual ac magnetic field amplitude at the position of the atom inside the vacuum chamber. The methods demonstrated in this work will help to improve the performance of the atom interferometer and are also useful in Ramsey interference -based systems and spinor Bose-Einstein condensates (BEC) experiments.