Bose-Einstein condensate in an elliptical waveguide
Quantum Gases
2022-03-23 v1
Abstract
We investigate the effects of spatial curvature for an atomic Bose-Einstein condensate confined in an elliptical waveguide. The system is well described by an effective 1D Gross-Pitaevskii equation with a quantum-curvature potential, which has the shape of a double-well but crucially depends on the eccentricity of the ellipse. The ground state of the system displays a quantum phase transition from a two-peak configuration to a one-peak configuration at a critical attractive interaction strength. In correspondence of this phase transition the superfluid fraction strongly reduces and goes to zero for a sufficiently attractive Bose-Bose interaction.
Cite
@article{arxiv.2203.09922,
title = {Bose-Einstein condensate in an elliptical waveguide},
author = {L. Salasnich},
journal= {arXiv preprint arXiv:2203.09922},
year = {2022}
}
Comments
12 pages, 4 figures, to be published in SciPost Physics Core