Ionic polaron in a Bose-Einstein condensate
| Autor: | Astrakharchik, G. E., Ardila, L. A. Peña, Schmidt, R., Jachymski, K., Negretti, A. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Commun. Phys. 4, 94 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s42005-021-00597-1 |
| Popis: | 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. Comment: published version, 10 pages, 5 figures, 1 table |
| Databáze: | arXiv |
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