The group is supported from the programme SONATA BIS by the National Science Center (Grant No. 2019/34/E/ST2/00289). The main topic are the quantum droplets - the new and fascinating state of matter recently observed in Stuttgart. We focus on 1D and quasi-1D droplets, which can be studied with a variety of methods and therefore thouroughly characterized.
The aim of the project is to find and study new phases arising in gases of atoms interacting via two types of competing (attractive and repulsive) forces: short-range and non-local. When these forces compensate each other, new phases can appear, stabilized by quantum many-body correlations. This was the case with dipolar Bose-Einstein condensate, in which this year three groups observed a state behaving like a supersolid. Inspired by these discoveries, we will look for such phases in a broader class of physical systems, in particular in the dipolar gases and atoms trapped in the resonant cavities. First we find phase diagrams, then we classify excitations to finally investigate how the phases decay.
We study ground-states in 1D. Using mean-field, hydrodynamical and many-body approaches we look for and thouroughly characterize the new phases.
We look at two types of excitations: the Bogoliubov-ones and solitons.
Thermal effect, losses, and departure from 1D geometry -- these research topics, interesting by themselves, plays a crucial role in the experimental tries.
