Quantum rotor in a two-dimensional mesoscopic Bose gas
Quantum Gases
2025-03-12 v3 Atomic and Molecular Clusters
Atomic Physics
Chemical Physics
Abstract
We investigate a molecular quantum rotor in a two-dimensional Bose-Einstein condensate. The focus is on studying the angulon quasiparticle concept in the crossover from few- to many-body physics. To this end, we formulate the problem in real space and solve it with a mean-field approach in the frame co-rotating with the impurity. We show that the system starts to feature angulon characteristics when the size of the bosonic cloud is large enough to screen the rotor. More importantly, we demonstrate the departure from the angulon picture for large system sizes or large angular momenta where the properties of the system are determined by collective excitations of the Bose gas.
Cite
@article{arxiv.2407.06046,
title = {Quantum rotor in a two-dimensional mesoscopic Bose gas},
author = {Michał Suchorowski and Alina Badamshina and Mikhail Lemeshko and Michał Tomza and Artem G. Volosniev},
journal= {arXiv preprint arXiv:2407.06046},
year = {2025}
}
Comments
Version accepted for publication in SciPost Physics