TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.18.2.059
TI  - Quantum rotor in a two-dimensional mesoscopic Bose gas
PY  - 2025/02/19
UR  - https://www.scipost.org/SciPostPhys.18.2.059
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 18
IS  - 2
SP  - 059
A1  - Suchorowski, Michał
AU  - Badamshina, Alina
AU  - Lemeshko, Mikhail
AU  - Tomza, Michał
AU  - Volosniev, Artem G.
AB  - 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.
ER  -

@Article{10.21468/SciPostPhys.18.2.059,
	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={SciPost Phys.},
	volume={18},
	pages={059},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.18.2.059},
	url={https://scipost.org/10.21468/SciPostPhys.18.2.059},
}