Dephasing in sodium Ramsey interferometry under a weak inhomogeneous magnetic field

Abstract

In Ramsey interference of the clock transition of cold sodium atoms, we observed dephasing of the visibility, which was based on the frequency fluctuation due to the second-order Zeeman effect for inhomogeneity of the magnetic field within the atomic cloud. The frequency fluctuation was enhanced with increased strength of the quantization magnetic field, causing the dephasing of the visibility to become large. The theoretical dephasing function with frequency fluctuation was in good agreement with experimental values.

Scalar Aharonov–Bohm Phase in Ramsey Atom Interferometry under Time-Varying Potential

“…The experimental apparatus and setup were almost the same as those described in detail in our previous papers [12,15]. The time-domain Ramsey atom interferometer was composed of two ground hyperfine spin states of a cold sodium atom ensemble.…”

“…In this paper, we investigate the Ramsey fringes of the magnetic field insensitive 0 → 0 clock transition. The transition probability to the F = 2 was measured using the probe beam described in our previous paper [15]. …”