Details
| Original language | English |
|---|---|
| Article number | 94 |
| Journal | Communications Physics |
| Volume | 4 |
| Issue number | 1 |
| Publication status | Published - 11 May 2021 |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Communications Physics, Vol. 4, No. 1, 94, 11.05.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ionic polaron in a Bose-Einstein condensate
AU - Astrakharchik, Grigory E.
AU - Ardila, Luis A.Peña
AU - Schmidt, Richard
AU - Jachymski, Krzysztof
AU - Negretti, Antonio
N1 - Funding Information: This work is supported by the Cluster of Excellence ‘CUI: Advanced Imaging of Matter’ of the Deutsche Forschungsgemeinschaft (DFG)—EXC 2056—project ID 390715994, the DFG Excellence Cluster QuantumFrontiers, the DFG project NE 1711/3-1, the DFG project SPP 1929 (GiRyd), the Polish National Agency for Academic Exchange (NAWA) via the Polish Returns 2019 program, and the Spanish MINECO (FIS2017-84114-C2-1-P). The Barcelona Supercomputing Center (The Spanish National Supercomputing Center—Centro Nacional de Supercomputación) is acknowledged for the provided computational facilities (RES-FI-2019-3-0018). R.S. is supported by the DFG under Germany’s Excellence Strategy—EXC-2111—project ID 390814868. G.E.A. acknowledges financial support from Secretaria d’Universitats i Recerca del Departament d’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).
PY - 2021/5/11
Y1 - 2021/5/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85105811023&partnerID=8YFLogxK
U2 - 10.1038/s42005-021-00597-1
DO - 10.1038/s42005-021-00597-1
M3 - Article
AN - SCOPUS:85105811023
VL - 4
JO - Communications Physics
JF - Communications Physics
IS - 1
M1 - 94
ER -