Harmonic Stability Analysis of the 2D Square and Hexagonal Bravais Lattices for a Finite--Ranged Repulsive Pair Potential. Consequence for a 2D System of Ultracold Composite Bosons

D. J. Papoular

We consider a classical, two-dimensional system of identical particles which interact via a finite-ranged, repulsive pair potential. We assume that the system is in a crystalline p…