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- Title
Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux.
- Authors
Brauneis, Fabian; Ghazaryan, Areg; Hammer, Hans-Werner; Volosniev, Artem G.
- Abstract
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. Aharonov-Bohm ring is an intuitive single-particle model applied across many fields of physics, but at the cost of neglecting the many-body interactions between particles and with the environment. Motivated by recent cold-atom experiments on Bose polarons, the authors study a particle contained in Aharonov-Bohm ring and weakly interacting Bose gas.
- Subjects
POLARONS; BOSE-Einstein gas; PARTICLE interactions; QUASIPARTICLES; MASS spectrometry
- Publication
Communications Physics, 2023, Vol 6, Issue 1, p1
- ISSN
2399-3650
- Publication type
Article
- DOI
10.1038/s42005-023-01281-2