Vortices in Atomic Bose-Einstein Condensates in the Large Gas Parameter Region

TL;DR

This paper compares the Gross-Pitaevskii and modified Gross-Pitaevskii equations with ab initio Monte Carlo calculations to study vortices in atomic Bose-Einstein condensates at high gas parameters, showing strong agreement.

Contribution

It demonstrates the accuracy of the modified Gross-Pitaevskii equation in modeling vortex states in Bose-Einstein condensates at large gas parameters compared to ab initio methods.

Findings

Excellent agreement between modified Gross-Pitaevskii and Monte Carlo results

Validation of the modified Gross-Pitaevskii equation for vortex states

Insights into high gas parameter regimes in BECs

Abstract

In this work we compare the results of the Gross-Pitaevskii and modified Gross-Pitaevskii equations with ab initio variational Monte Carlo calculations for Bose-Einstein condensates of atoms in axially symmetric traps. We examine both the ground state and excited states having a vortex line along the z-axis at high values of the gas parameter and demonstrate an excellent agreement between the modified Gross-Pitaevskii and ab initio Monte Carlo methods, both for the ground and vortex states.