Probing the hollowing transition of a shell-shaped BEC with collective excitation
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866912277170487296 |
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| author | Huang, Zerong Lee, Kai Yuen Wong, Chun Kit Qiu, Liyuan Yang, Bo Yan, Yangqian Wang, Dajun |
| author_facet | Huang, Zerong Lee, Kai Yuen Wong, Chun Kit Qiu, Liyuan Yang, Bo Yan, Yangqian Wang, Dajun |
| contents | We investigate the hollowing transition of a shell-shaped Bose-Einstein condensate using collective excitations. The shell is created using an immiscible dual-species BEC mixture, with its hollowness controlled by tuning the repulsive interspecies interaction via a Feshbach resonance. Our results reveal two distinct monopole modes in which the two condensates oscillate either in-phase or out-of-phase. The spectrum of the out-of-phase mode exhibits a non-monotonic dependence on the interspecies interaction, providing a clear signature of the topology change from a filled to a hollow condensate. Furthermore, we find that the critical point of the hollowing transition depends strongly on the number ratio of the two species. Our findings provide a detailed understanding of the topology change in shell-shaped quantum gases and pave the way for future study of quantum many-body phenomena in curved spaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_12318 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing the hollowing transition of a shell-shaped BEC with collective excitation Huang, Zerong Lee, Kai Yuen Wong, Chun Kit Qiu, Liyuan Yang, Bo Yan, Yangqian Wang, Dajun Quantum Gases Atomic Physics Quantum Physics We investigate the hollowing transition of a shell-shaped Bose-Einstein condensate using collective excitations. The shell is created using an immiscible dual-species BEC mixture, with its hollowness controlled by tuning the repulsive interspecies interaction via a Feshbach resonance. Our results reveal two distinct monopole modes in which the two condensates oscillate either in-phase or out-of-phase. The spectrum of the out-of-phase mode exhibits a non-monotonic dependence on the interspecies interaction, providing a clear signature of the topology change from a filled to a hollow condensate. Furthermore, we find that the critical point of the hollowing transition depends strongly on the number ratio of the two species. Our findings provide a detailed understanding of the topology change in shell-shaped quantum gases and pave the way for future study of quantum many-body phenomena in curved spaces. |
| title | Probing the hollowing transition of a shell-shaped BEC with collective excitation |
| topic | Quantum Gases Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2503.12318 |