Figure 1: The sp orbital ladder reduced from a 2D double-well optical lattice. | Nature Communications

Figure 1: The sp orbital ladder reduced from a 2D double-well optical lattice.

From: Topological states in a ladder-like optical lattice containing ultracold atoms in higher orbital bands

Figure 1

(a) An optical lattice of uneven sub-wells (light and dark blue), with parameters Vx/V1=0.3, V2/V1=1 and φ=0.6π, develops high barriers (red ridges) in the y direction, slicing the lattice into dynamically decoupled uneven two-leg ladders. (b,c) Schematic side and top views, respectively, of the ladder illustrate tunneling (t′s) of fermions prepared in the degenerate s and px levels. (d) Topological winding of Hamiltonian across the Brillouin zone.

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