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)

BibTeX

@article{e440599f618c48389197680dbb186160,
title = "Many-body bound states and induced interactions of charged impurities in a bosonic bath",
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.",
author = "Astrakharchik, {Grigory E.} and Ardila, {Luis A.Pe{\~n}a} and Krzysztof Jachymski and Antonio Negretti",
note = "Funding Information: We acknowledge discussions with Georg Bruun on his related work. This work is supported by the project NE 1711/3-1 of the Deutsche Forschungsgemeinschaft, the Polish National Agency for Academic Exchange (NAWA) via the Polish Returns 2019 programme, by the Secretaria d{\textquoteright}Universitats i Recerca del Departament d{\textquoteright}Empresa i Coneixement de la Generalitat de Catalunya, co-funded by the European Union Regional Development Fund within the ERDF Operational Program of Catalunya (project QuantumCat, ref. 001-P-001644), Grant PID2020-113565GB-C21 funded by MCIN/AEI/10.13039/501100011033, the Spanish MINECO (FIS2017-84114-C2-1-P), and the Secretaria d{\textquoteright}Universitats i Recerca del Departament d{\textquoteright}Empresa i Coneixement de la Generalitat de Catalunya within the ERDF Operational Program of Catalunya (project QuantumCat, Ref. 001-P-001644). LA acknowledges support of the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy– EXC-2123 QuantumFrontiers– 390837967, and FOR 2247. ",
year = "2023",
month = mar,
day = "24",
doi = "10.48550/arXiv.2206.03476",
language = "English",
volume = "14",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}