Ionic polaron in a Bose-Einstein condensate

Autor: Richard Schmidt, Luis A. Peña Ardila, Antonio Negretti, Grigory E. Astrakharchik, Krzysztof Jachymski
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
Externí odkaz: