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Bose-Einstein condensate in an elliptical waveguide

by Luca Salasnich

Submission summary

As Contributors: Luca Salasnich
Preprint link: scipost_202109_00024v1
Date submitted: 2021-09-18 16:40
Submitted by: Salasnich, Luca
Submitted to: SciPost Physics
Academic field: Physics
  • Atomic, Molecular and Optical Physics - Theory
  • Condensed Matter Physics - Theory
Approaches: Theoretical, Phenomenological


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.

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Submission scipost_202109_00024v1 on 18 September 2021

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