Lattice Computation of the Effective Potential in O(2)-Invariant $\lambda {\Phi }^4$ Theory

A. Agodi, G. Andronico, M. Consoli

We present a lattice computation of the effective potential for O(2)-invariant $(\lambda {\Phi }^4{)}_4$ theory in the region of bare parameters corresponding to a classically scale-invariant the…