Fractional quantum Hall liquid, Wigner solid phase boundary at finite density and magnetic field

Abstract
At finite magnetic field and fixed filling factor ν, as the particle density decreases, the fractional quantum Hall state will at some point give way to the Wigner solid. We calculate the ground-state energy of a Laughlin-like variational wave function at finite magnetic field and density by a quantum Monte Carlo method and compare the results with a calculation of the Wigner solid energy to get an estimate of the zero temperature finite density phase boundary.