Many-body bound states and induced interactions of charged impurities in a bosonic bath
- authored by
- Grigory E. Astrakharchik, Luis A.Peña Ardila, Krzysztof Jachymski, Antonio Negretti
- Abstract
Induced interactions and bound states of charge carriers immersed in a quantum medium are crucial for the investigation of quantum transport. Ultracold atom-ion systems can provide a convenient platform for studying this problem. Here, we investigate the static properties of one and two ionic impurities in a bosonic bath using quantum Monte Carlo methods. We identify three bipolaronic regimes depending on the strength of the atom-ion potential and the number of its two-body bound states: a perturbative regime resembling the situation of a pair of neutral impurities, a non-perturbative regime that loses the quasi-particle character of the former, and a many-body bound state regime that can arise only in the presence of a bound state in the two-body potential. We further reveal strong bath-induced interactions between the two ionic polarons. Our findings show that numerical simulations are indispensable for describing highly correlated impurity models.
- Organisation(s)
-
QuantumFrontiers
Institute of Theoretical Physics
- External Organisation(s)
-
Universitat Politècnica de Catalunya
Universitat de Barcelona
University of Warsaw
Zentrum für Optische Quantentechnologien (ZOQ)
- Type
- Article
- Journal
- Nature Communications
- Volume
- 14
- No. of pages
- 11
- ISSN
- 2041-1723
- Publication date
- 24.03.2023
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General Chemistry, General Biochemistry,Genetics and Molecular Biology, General, General Physics and Astronomy
- Electronic version(s)
-
https://doi.org/10.48550/arXiv.2206.03476 (Access:
Open)
https://doi.org/10.1038/s41467-023-37153-0 (Access: Open)