Quantum rotor in a two-dimensional mesoscopic Bose gas
Suchorowski M, Badamshina A, Lemeshko M, Tomza M, Volosniev A. 2025. Quantum rotor in a two-dimensional mesoscopic Bose gas. SciPost Physics. 18(2), 059.
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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.
Publishing Year
Date Published
2025-02-19
Journal Title
SciPost Physics
Publisher
SciPost Foundation
Acknowledgement
We thank Fabian Brauneis, Arthur Christianen and Pietro Massignan for useful discussions. M. S. and A. G. V. would like to thank the Institut Henri Poincaré
(UAR 839 CNRS-Sorbonne Université) and the LabEx CARMIN (ANR-10-LABX-59-01) for
their support and hospitality during the final stages of completion of this work. M.S.
and M.T. acknowledge the National Science Centre, Poland, within Sonata Bis Grant No.
2020/38/E/ST2/00564. M.L. acknowledges support by the European Research Council (ERC)
Starting Grant No.801770 (ANGULON). M.S. acknowledges the National Science Centre,
Poland, within Preludium Grant No. 2023/49/N/ST2/03820. We gratefully acknowledge
Poland’s high-performance Infrastructure PLGrid ACK Cyfronet AGH for providing computer
facilities and support within computational grant no PLG/2023/016878.
Volume
18
Issue
2
Article Number
059
eISSN
IST-REx-ID
Cite this
Suchorowski M, Badamshina A, Lemeshko M, Tomza M, Volosniev A. Quantum rotor in a two-dimensional mesoscopic Bose gas. SciPost Physics. 2025;18(2). doi:10.21468/SciPostPhys.18.2.059
Suchorowski, M., Badamshina, A., Lemeshko, M., Tomza, M., & Volosniev, A. (2025). Quantum rotor in a two-dimensional mesoscopic Bose gas. SciPost Physics. SciPost Foundation. https://doi.org/10.21468/SciPostPhys.18.2.059
Suchorowski, Michał, Alina Badamshina, Mikhail Lemeshko, Michał Tomza, and Artem Volosniev. “Quantum Rotor in a Two-Dimensional Mesoscopic Bose Gas.” SciPost Physics. SciPost Foundation, 2025. https://doi.org/10.21468/SciPostPhys.18.2.059.
M. Suchorowski, A. Badamshina, M. Lemeshko, M. Tomza, and A. Volosniev, “Quantum rotor in a two-dimensional mesoscopic Bose gas,” SciPost Physics, vol. 18, no. 2. SciPost Foundation, 2025.
Suchorowski M, Badamshina A, Lemeshko M, Tomza M, Volosniev A. 2025. Quantum rotor in a two-dimensional mesoscopic Bose gas. SciPost Physics. 18(2), 059.
Suchorowski, Michał, et al. “Quantum Rotor in a Two-Dimensional Mesoscopic Bose Gas.” SciPost Physics, vol. 18, no. 2, 059, SciPost Foundation, 2025, doi:10.21468/SciPostPhys.18.2.059.
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