Bose-Einstein condensate in an elliptical waveguide

Salasnich, Luca

doi:10.21468/SciPostPhysCore.5.1.015

SciPost Physics Core

Bose-Einstein condensate in an elliptical waveguide

Luca Salasnich

SciPost Phys. Core 5, 015 (2022) · published 22 March 2022

doi: 10.21468/SciPostPhysCore.5.1.015
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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.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.5.1.015
TI  - Bose-Einstein condensate in an elliptical waveguide
PY  - 2022/03/22
UR  - https://scipost.org/SciPostPhysCore.5.1.015
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 5
IS  - 1
SP  - 015
A1  - Salasnich, Luca
AB  - 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.
ER  -

@Article{10.21468/SciPostPhysCore.5.1.015,
	title={{Bose-Einstein condensate in an elliptical waveguide}},
	author={Luca Salasnich},
	journal={SciPost Phys. Core},
	volume={5},
	pages={015},
	year={2022},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.5.1.015},
	url={https://scipost.org/10.21468/SciPostPhysCore.5.1.015},
}

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¹ ² ³ Luca Salasnich