Ionic polaron in a Bose-Einstein condensate
- authored by
- Grigory E. Astrakharchik, Luis A.Peña Ardila, Richard Schmidt, Krzysztof Jachymski, Antonio Negretti
- Abstract
The presence of strong interactions in a many-body quantum system can lead to a variety of exotic effects. Here we show that even in a comparatively simple setup consisting of a charged impurity in a weakly interacting bosonic medium the competition of length scales gives rise to a highly correlated mesoscopic state. Using quantum Monte Carlo simulations, we unravel its vastly different polaronic properties compared to neutral quantum impurities. Moreover, we identify a transition between the regime amenable to conventional perturbative treatment in the limit of weak atom-ion interactions and a many-body bound state with vanishing quasi-particle residue composed of hundreds of atoms. In order to analyze the structure of the corresponding states, we examine the atom-ion and atom-atom correlation functions which both show nontrivial properties. Our findings are directly relevant to experiments using hybrid atom-ion setups that have recently attained the ultracold regime.
- Organisation(s)
-
Institute of Theoretical Physics
QuantumFrontiers
- External Organisation(s)
-
Universitat Politècnica de Catalunya
Max Planck Institute of Quantum Optics (MPQ)
Munich Center for Quantum Science and Technology (MCQST)
Forschungszentrum Jülich
University of Warsaw
Universität Hamburg
- Type
- Article
- Journal
- Communications Physics
- Volume
- 4
- Publication date
- 11.05.2021
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General Physics and Astronomy
- Electronic version(s)
-
https://doi.org/10.1038/s42005-021-00597-1 (Access:
Open)