Figure 4: Stability of the Floquet system.
From: Spin-momentum coupled Bose-Einstein condensates with lattice band pseudospins
(a) Number of atoms remaining in trap after adiabatically loading a BEC into the FB band, normalized to initial atom number determined from independent experimental runs. The static lattice is ramped on to 5.47 ER in 200 ms. Then the moving lattice is ramped on to a depth of V′=0.5 ER in 60 ms. The dips α, β and γ occur close to the Bloch bands p, d and f. (b–d) The TOF images and the effective band structures for data points labelled in a. The arrows show where the BEC is situated after the moving lattice is adiabatically ramped on.
