Two-Dimensional Quantum Droplets in Binary Dipolar Bose-Bose Mixture

Aowei Yang, Guilong Li, Xunda Jiang, Zhiwei Fan, Zhaopin Chen, Bin Liu, Yongyao Li

Research output: Contribution to journalArticlepeer-review

1 Citation (SciVal)


We study two-dimensional (2D) isotropic quantum droplets (QDs) in dipolar binary Bose–Einstein condensates (BECs). The QDs are supported by the competition between the 2D form of the Lee-Huang-Yang (LHY) term and the isotropic dipole-dipole interactions (DDIs). Moreover, the DDIs in the 2D plane can be tuned to be either repulsive or attractive. Before that, QDs in dipolar BECs were often explored in three-dimensional (3D) systems, with competition between the attractive DDIs and the repulsive LHY term. Unlike the 3D system, the LHY term of the 2D binary system behaves in a logarithmic form, which can feature both attraction and repulsion. In this case, the QDs can be produced regardless of the interactions (attraction, repulsion, or zero) that the mean-field effect represents. In this paper, we model the aforementioned QDs via the 2D binary dipolar BECs with the competition between isotropic DDIs and the logarithmic LHY term. Their characteristic parameters (the peak density, (Formula presented.), chemical potential, (Formula presented.), and effective area, (Formula presented.)) using both numerical and theoretical methods are discussed. The centripetal collision and oblique collision between moving QDs are also studied.

Original languageEnglish
Article number405
Issue number4
Early online date4 Apr 2023
Publication statusPublished - 30 Apr 2023

Bibliographical note

Funding Information:
This research was funded by Natural Science Foundation of Guangdong province (2021A1515010214), NNSFC (China) (12274077, 11905032, 11874112, 11904051), Guang Dong Basic and Applied Basic Research Foundation (2021A1515111015); Key Research Projects of General Colleges in Guangdong Province (2019KZDXM001), Special Funds for the Cultivation of Guangdong College Students Scientific and Technological Innovation (pdjh2021b0529, pdjh2022a0538), Research Fund of Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology (2020B1212030010).

Data Availability Statement
Not applicable


  • dipolar binary Bose–Einstein condensates
  • Lee-Huang-Yang term
  • quantum droplets

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Radiology Nuclear Medicine and imaging


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