Figure 2: Two-body interaction potentials (the upper panel)—$V_{\text{softcore}}(r)$ [9] and $V_{\text{roton-type}}(r)$ [8]—leading to a supersolid characterized by spatial density modulations (shown in the lower panel) significantly larger than the interparticle distance. Vertical axes—arbitrary units. Horizontal axes measure distances in units of the interparticle separation.