Quantum rotor in a two-dimensional mesoscopic Bose gas
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...
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| Format: | Article |
| Language: | English |
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SciPost
2025-02-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.18.2.059 |
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| _version_ | 1849721109193162752 |
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| author | Michał Suchorowski, Alina Badamshina, Mikhail Lemeshko, Michał Tomza, Artem G. Volosniev |
| author_facet | Michał Suchorowski, Alina Badamshina, Mikhail Lemeshko, Michał Tomza, Artem G. Volosniev |
| author_sort | Michał Suchorowski, Alina Badamshina, Mikhail Lemeshko, Michał Tomza, Artem G. Volosniev |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-1a67d1e90803483abcc0b7f0002e0f94 |
| institution | DOAJ |
| issn | 2542-4653 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj-art-1a67d1e90803483abcc0b7f0002e0f942025-08-20T03:11:46ZengSciPostSciPost Physics2542-46532025-02-0118205910.21468/SciPostPhys.18.2.059Quantum rotor in a two-dimensional mesoscopic Bose gasMichał Suchorowski, Alina Badamshina, Mikhail Lemeshko, Michał Tomza, Artem G. VolosnievWe 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.https://scipost.org/SciPostPhys.18.2.059 |
| spellingShingle | Michał Suchorowski, Alina Badamshina, Mikhail Lemeshko, Michał Tomza, Artem G. Volosniev Quantum rotor in a two-dimensional mesoscopic Bose gas SciPost Physics |
| title | Quantum rotor in a two-dimensional mesoscopic Bose gas |
| title_full | Quantum rotor in a two-dimensional mesoscopic Bose gas |
| title_fullStr | Quantum rotor in a two-dimensional mesoscopic Bose gas |
| title_full_unstemmed | Quantum rotor in a two-dimensional mesoscopic Bose gas |
| title_short | Quantum rotor in a two-dimensional mesoscopic Bose gas |
| title_sort | quantum rotor in a two dimensional mesoscopic bose gas |
| url | https://scipost.org/SciPostPhys.18.2.059 |
| work_keys_str_mv | AT michałsuchorowskialinabadamshinamikhaillemeshkomichałtomzaartemgvolosniev quantumrotorinatwodimensionalmesoscopicbosegas |