On instability of ground states in 2D CP(N-1) and O(N) models at large N

A. Gorsky, A. Pikalov, A. Vainshtein

We consider properties of the inhomogeneous solution found recently for \mbox{${\mathbb{CP}}^{N-1}$} model. The solution was interpreted as a soliton. We reevaluate its energy in t…