Extended Data Fig. 1: Analysis of the boundary potential.
From: Observation of chiral edge transport in a rapidly rotating quantum gas
(a,d) Images of the projected optical boundary. The white boxes indicate the approximate azimuthal range explored by the atoms as they pass through the saddle minimum, and hence the edge mode speed is maximum. (b,e) The measured radial intensity I(r), averaged over the indicated range of azimuthal angles. The green line shows a fitted error function. (c,f) The black curve is the inferred intensity profile at the atoms, obtained by de-convolution of the green curve in (b,e). The orange line is a piecewise linear fit to the black curve, whose slope provides the effective steepness of the boundary potential.
