According to a theoretical prediction by Chen Guihua, associate professor at the School of Electronic Engineering and Intelligence of DGUT, a discrete vortex quantum droplet exists in a two-dimensional optical lattice and can carry a high number of topological charges. The title of the research paper is "Discrete vortex quantum droplets,", which was published in the Elsevier Publishing Group journal Chaos, Solitons and Fractals (influence factor: 9.922, top journal of Zone 1 of the Chinese Academy of Sciences). Zhao Zibin, the first author of this paper, is a junior college student at the School of Electronic Engineering and Intelligence, and associate professor Chen Guihua, is the corresponding author. This is the first time that an undergraduate from the School of Electronic Engineering and Intelligence has published a paper in the premier journal of Zone 1 of the Chinese Academy of Sciences, marking yet another advancement in improving the academic research capability of the undergraduates of the School of Electronic Engineering and Intelligence.

The existence and stability of discrete vortex quantum droplets in a two-dimensional optical lattice under the combined effect of mean field effect and quantum fluctuation effect were studied and discussed in this paper. The research shows that the system can support the stable existence of at least two discrete vortex quantum droplets (on-site-centered and off-site-centered) carrying five topological charges (Fig. 1). The mixed vortex mode of quantum droplets was also discovered for the first time through this study. In this mode, two components of the quantum droplet with the same density distribution carry different topological charges (Fig. 2).

Figure 1: Two types of quantum droplets carrying five topological charges. (a-d) Density distribution, phase, linear stability analysis, and dynamic real-time evolution stability analysis of the first type of quantum droplets. (e-h) Density distribution, phase, linear stability analysis, and dynamic real-time evolution stability analysis of the second type of quantum droplets.

Figure 2: Mixed vortex mode of two types of quantum droplets

Paper Link：https://www.sciencedirect.com/science/article/pii/S0960077922006919?dgcid=coauthor