Characterization of the drift of magnetic field. (a) Drift of center of the stripes indicates the drift of magnetic field. (b) Drift of the magnetic field under different temperature fluctuations of the coils. To obtain the center of stripes, we integrates the counts in each row to get the curve and then fits it with a sum of gaussian functions to get the position of peaks, as shown in right panels of Fig. 5. The error bars show 1σ statistical uncertainty of the fitted centers. The relationship between the drift of stripes and the drift of magnetic fields is estimated with the magnetic field gradient and the structure of stripes. (c) An exemplary image of the atoms selected in a single layer when the noise and drift of the magnetic fields are suppressed.