Macroscopic quantum tunnelling of a Bose-Einstein condensate in a Cubic-Plus-Quadratic Well
Abstract We study the macroscopic quantum tunnelling of an interacting Bose-Einstein condensate in a cubic-plus-quadratic well that was approximately realized in recent experiment. We utilise the Gross-Pitaevskii equation and Wentzel-Kramers-Brillouin (WKB) method to investigate the effect of the inter-atomic interactions on the tunnelling rate of a quasi-bound condensate. We find that the existence of repulsive interaction enhances the quantum tunnelling of a trapped Bose-Einstein condensate.
Authors
- Rui‐Bin Liu (ORCID: https://orcid.org/0000-0002-5401-2395)
- Mingyang Liu (ORCID: https://orcid.org/0000-0002-4556-0998)
- Shizhong Zhang (ORCID: https://orcid.org/0000-0002-1910-5721)
Institutions
- Shenzhen University (CN)
- Hong Kong University of Science and Technology (HK)
- Shenzhen Baoan High School Group (CN)
- University of Hong Kong (HK)
Publication Details
- Journal
- AAPPS bulletin
- Published
- 2025-02-28
- DOI
- https://doi.org/10.1007/s43673-025-00144-y
- Citations
- 3
- Primary Topic
- Cold Atom Physics and Bose-Einstein Condensates
- Type
- article
- Field-Weighted Citation Impact
- 3.74