Extended Data Fig. 3: Wave coupling.
a, Experimental visualization of the wave field generated by a single walker in a 1D lattice with the same geometry as in Fig. 1h and γ/γF = 92.0%. The submerged wells can be identified as the regions with a different shade of grey. b, Superposition of the wave field shown in a and the zeros of the drop-centred Bessel function \({J}_{0}({k}_{\text{F}}|{\bf{x}} \mbox{-} {{\bf{x}}}_{{\rm{i}}}|)\). c, Wave field of a bouncer computed with the theoretical model developed previously68 for walkers over variable topography. The bouncer is located at (x, y) = (3D/8, 0) in a 2D square lattice with the same well diameter D and centre-to-centre separation L as in a and γ/γF = 88.0%. Solid blue lines denote the submerged wells and dashed lines the zeros of a Bessel function J0 centred at the drop position.
