Correlations in lowest Landau level vortex states

TL;DR

This paper demonstrates how bosonic Jastrow correlations can be incorporated into vortex states in a harmonic trap, showing they lower energy and hinting at their role in vortex lattice melting at high angular momentum.

Contribution

It introduces a method to describe vortex states with bosonic Jastrow correlations and analyzes their impact on energy compared to mean-field states.

Findings

Correlations lower the energy of vortex states.

The approach extends to vortex lattice states.

Results suggest correlations influence vortex lattice melting.

Abstract

We show how the configuration-space form of the Bogoliubov ground state wave function of a bosonic condensate with a single vortex in a harmonic trap can be described in terms of bosonic Jastrow correlations. We then generalize this result to study the first effects of such correlations on a mean-field vortex lattice state and show that the included correlations lower the energy below that of the mean-field state. Although the reduction is relatively small, it is a precursor of the more general expected effect of correlations in describing the melting of the vortex lattice at large angular momentum per particle.