Ionic polaron in a Bose-Einstein condensate
- verfasst von
- 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.
- Organisationseinheit(en)
-
Institut für Theoretische Physik
QuantumFrontiers
- Externe Organisation(en)
-
Universitat Politècnica de Catalunya
Max-Planck-Institut für Quantenoptik (MPQ)
Munich Center for Quantum Science and Technology (MCQST)
Forschungszentrum Jülich
Uniwersytet Warszawski
Universität Hamburg
- Typ
- Artikel
- Journal
- Communications Physics
- Band
- 4
- Publikationsdatum
- 11.05.2021
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Elektronische Version(en)
-
https://doi.org/10.1038/s42005-021-00597-1 (Zugang:
Offen)