Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux Brauneis, Fabian Ghazaryan, Areg ; https://orcid.org/0000-0001-9666-3543 Hammer, Hans-Werner Volosniev, Artem ; https://orcid.org/0000-0003-0393-5525 General Physics and Astronomy ddc:530 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. Springer Nature 2023 info:eu-repo/semantics/article doc-type:article text http://purl.org/coar/resource_type/c_2df8fbb1 https://research-explorer.ista.ac.at/record/14246 https://research-explorer.ista.ac.at/download/14246/14268 Brauneis F, Ghazaryan A, Hammer H-W, Volosniev A. Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux. <i>Communications Physics</i>. 2023;6. doi:<a href="https://doi.org/10.1038/s42005-023-01281-2">10.1038/s42005-023-01281-2</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1038/s42005-023-01281-2 info:eu-repo/semantics/altIdentifier/issn/2399-3650 info:eu-repo/semantics/altIdentifier/wos/001052577500002 info:eu-repo/semantics/altIdentifier/arxiv/2301.10488 info:eu-repo/semantics/openAccess