Ionic polaron in a Bose-Einstein condensate
| Autor: | Richard Schmidt, Luis A. Peña Ardila, Antonio Negretti, Grigory E. Astrakharchik, Krzysztof Jachymski |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Atoms
Atomic Physics (physics.atom-ph) Quantum Monte Carlo QC1-999 General Physics and Astronomy FOS: Physical sciences Bose-Einstein condensation Polaron Astrophysics 01 natural sciences Physics - Atomic Physics 010305 fluids & plasmas law.invention law 0103 physical sciences Bound state Quantum system Condensació de Bose-Einstein ddc:530 010306 general physics Quantum Boson Physics Condensed Matter::Quantum Gases Ions Quantum Physics Mesoscopic physics Condensed matter physics Física [Àrees temàtiques de la UPC] Matter waves and particle beams Polarons Monte Carlo methods QB460-466 Quantum Gases (cond-mat.quant-gas) Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik Condensed Matter - Quantum Gases Quantum Physics (quant-ph) Statistical mechanics Bose–Einstein condensate Bose–Einstein condensates |
| Zdroj: | Communications Physics UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Communications Physics, Vol 4, Iss 1, Pp 1-8 (2021) Communications Physics 4(1), 94 (2021). doi:10.1038/s42005-021-00597-1 Communications Physics 4 (2021) |
| 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: | OpenAIRE |
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