Extended Data Fig. 3: Offset calibration.
From: Formation of individual stripes in a mixed-dimensional cold-atom Fermi–Hubbard system
a, We load a dilute cloud into a deep superlattice (Vx = 40ER, Vy = 8ER and \({V}_{y}^{{\rm{SL}}}=21{E}_{{\rm{R}}}\)) with different phase and extract the imbalance in occupation between neighbouring chains to calibrate the symmetric phase. b, At the symmetric double-well configuration (ϕ = 0), we reach zero imbalance, whereas even for small deviations, we quickly occupy only one part of the double well. All of the main experimental results are obtained for ϕ = π/2. Doublon density (c) and imbalance between chains (d) as a function of potential offset Δ (that is, superlattice power) for a relative superlattice phase of π/2. The peak in the doublon density coincides with the interaction energy U (grey line), at which atoms are then resonantly transferred to neighbouring chains. For small offsets, tunnelling is not yet fully suppressed and an imbalance is created. Above an intermediate peak at U/2 (created by a higher-order process), there is a low-imbalance regime in which the experiment is performed (black line).
