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Bose-Einstein condensate in an elliptical waveguide
by Luca Salasnich
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Luca Salasnich |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202109_00024v3 (pdf) |
| Date accepted: | 2022-03-18 |
| Date submitted: | 2022-03-08 13:27 |
| Submitted by: | Salasnich, Luca |
| Submitted to: | SciPost Physics Core |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Phenomenological |
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.
Author comments upon resubmission
I thank the Referee who thinks that the revision is adequate.
Response to Report 2.
Thanks a lot for the nice Report. I have improved the paper by adding and discussing the relevant references suggested by the Referee. The changes are in blue.
List of changes
1. I have changed and added some sentences in the Introduction.
2. I have added 8 references.
All the changes are in blue.
Published as SciPost Phys. Core 5, 015 (2022)