Fig. 1: Bloch oscillations of a dipolar BEC in a one-dimensional optical lattice.
a Sketch of our experiment, consisting of a 1D optical lattice in the z-direction, loaded with an erbium BEC from an optical dipole trap with trapping frequencies ωx,y,z = 2π × (240(3), 30(3), 217(1)) Hz. Gravity acts along z. b Absorption images after time of flight (TOF) showing the momentum distributions during one Bloch cycle. c, d Evolution of the peak position of the momentum distribution (\({q}_{\max }\)) for as = (71.6(1.0), 59.8(1.0)) a0, respectively. A sawtooth fit (solid gray) to the data yields TBO = 0.469(4) ms, consistent with the expected value TBO = 2k/(mggrav). The error bars represent the standard error on the mean over 4–6 repetitions.
