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PreprintCC BY-NC-SA 4.0arXiv

Rabi-coupling-induced three-component quantum droplet in ultracold Bose gases

Abstract

We uncover a new mechanism for realizing three-component quantum droplets in ultracold Bose gases, where only one inter-species interaction is attractive. In this scheme, the inter-species attraction leads to a self-bound binary droplet, and the third component joins through Rabi coupling with one component of the binary droplet. We find that a stronger Rabi coupling leads to a larger fraction of the third component, but also destabilizes the entire droplet due to the involvement of more repulsive forces. Such instability can be remedied by a finite detuning between the Rabi-coupled components. We demonstrate these results in realistic Na-Rb mixtures, using both thermodynamic analyses and numerical simulations based on extended Gross-Pitaevskii equations. Our work outlines a general route for stabilizing multi-component droplets by bridging an existing binary droplet with additional components via suitable single-particle fields.

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BibTeX
@misc{ding2026rabicouplinginduced,
  title = {{Rabi-coupling-induced three-component quantum droplet in ultracold Bose gases}},
  author = {Xiao Ding and Dajun Wang and Xiaoling Cui},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2605.07372},
  eprint = {2605.07372},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.07372},
  note = {CC BY-NC-SA 4.0},
}
RIS
TY  - UNPB
TI  - Rabi-coupling-induced three-component quantum droplet in ultracold Bose gases
AU  - Xiao Ding
AU  - Dajun Wang
AU  - Xiaoling Cui
PY  - 2026
DA  - 2026/08/31
PB  - arXiv
DO  - 10.48550/arxiv.2605.07372
UR  - https://arxiv.org/abs/2605.07372
AB  - We uncover a new mechanism for realizing three-component quantum droplets in ultracold Bose gases, where only one inter-species interaction is attractive. In this scheme, the inter-species attraction leads to a self-bound binary droplet, and the third component joins through Rabi coupling with one component of the binary droplet. We find that a stronger Rabi coupling leads to a larger fraction of the third component, but also destabilizes the entire droplet due to the involvement of more repulsive forces. Such instability can be remedied by a finite detuning between the Rabi-coupled components. We demonstrate these results in realistic Na-Rb mixtures, using both thermodynamic analyses and numerical simulations based on extended Gross-Pitaevskii equations. Our work outlines a general route for stabilizing multi-component droplets by bridging an existing binary droplet with additional components via suitable single-particle fields.
ER  -