Many-body bound states and induced interactions of charged impurities in a bosonic bath

verfasst von
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.

Organisationseinheit(en)
QuantumFrontiers
Institut für Theoretische Physik
Externe Organisation(en)
Universitat Politècnica de Catalunya
Universitat de Barcelona (UB)
Uniwersytet Warszawski
Zentrum für Optische Quantentechnologien (ZOQ)
Typ
Artikel
Journal
Nature Communications
Band
14
Anzahl der Seiten
11
ISSN
2041-1723
Publikationsdatum
24.03.2023
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Chemie (insg.), Biochemie, Genetik und Molekularbiologie (insg.), Allgemein, Physik und Astronomie (insg.)
Elektronische Version(en)
https://doi.org/10.48550/arXiv.2206.03476 (Zugang: Offen)
https://doi.org/10.1038/s41467-023-37153-0 (Zugang: Offen)