Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux

article Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux published yes Fabian Brauneis author Areg Ghazaryan author 4AF46FD6-F248-11E8-B48F-1D18A9856A870000-0001-9666-3543 Hans-Werner Hammer author Artem Volosniev author 37D278BC-F248-11E8-B48F-1D18A9856A870000-0003-0393-5525 MiLe department The model of a ring threaded by the Aharonov-Bohm flux underlies our understanding of a coupling between gauge potentials and matter. The typical formulation of the model is based upon a single particle picture, and should be extended when interactions with other particles become relevant. Here, we illustrate such an extension for a particle in an Aharonov-Bohm ring subject to interactions with a weakly interacting Bose gas. We show that the ground state of the system can be described using the Bose-polaron concept—a particle dressed by interactions with a bosonic environment. We connect the energy spectrum to the effective mass of the polaron, and demonstrate how to change currents in the system by tuning boson-particle interactions. Our results suggest the Aharonov-Bohm ring as a platform for studying coherence and few- to many-body crossover of quasi-particles that arise from an impurity immersed in a medium. https://research-explorer.ista.ac.at/download/14246/14268/2023_CommPhysics_Brauneis.pdf application/pdfno https://creativecommons.org/licenses/by/4.0/ Springer Nature2023 eng General Physics and Astronomy Communications Physics 2399-3650 2301.10488 00105257750000210.1038/s42005-023-01281-2 6 F. Brauneis, A. Ghazaryan, H.-W. Hammer, and A. Volosniev, “Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux,” Communications Physics, vol. 6. Springer Nature, 2023. Brauneis, F., Ghazaryan, A., Hammer, H.-W., & Volosniev, A. (2023). Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux. Communications Physics. Springer Nature. <a href="https://doi.org/10.1038/s42005-023-01281-2">https://doi.org/10.1038/s42005-023-01281-2</a> Brauneis, Fabian, et al. “Emergence of a Bose Polaron in a Small Ring Threaded by the Aharonov-Bohm Flux.” Communications Physics, vol. 6, 224, Springer Nature, 2023, doi:<a href="https://doi.org/10.1038/s42005-023-01281-2">10.1038/s42005-023-01281-2</a>. Brauneis F, Ghazaryan A, Hammer H-W, Volosniev A. Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux. Communications Physics. 2023;6. doi:<a href="https://doi.org/10.1038/s42005-023-01281-2">10.1038/s42005-023-01281-2</a> F. Brauneis, A. Ghazaryan, H.-W. Hammer, A. Volosniev, Communications Physics 6 (2023). Brauneis F, Ghazaryan A, Hammer H-W, Volosniev A. 2023. Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux. Communications Physics. 6, 224. Brauneis, Fabian, Areg Ghazaryan, Hans-Werner Hammer, and Artem Volosniev. “Emergence of a Bose Polaron in a Small Ring Threaded by the Aharonov-Bohm Flux.” Communications Physics. Springer Nature, 2023. <a href="https://doi.org/10.1038/s42005-023-01281-2">https://doi.org/10.1038/s42005-023-01281-2</a>. 142462023-08-28T12:36:49Z2024-10-09T21:06:47Z