Related Experiment Video
Updated: Aug 5, 2025

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Many-body bound states and induced interactions of charged impurities in a bosonic bath
Grigory E Astrakharchik1,2,3, Luis A Peña Ardila4, Krzysztof Jachymski5
1Department de Física, Universitat Politécnica de Catalunya, Campus Nord B4-B5, E-08034, Barcelona, Spain. grigori.astrakharchik@upc.edu.
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.
More Related Videos
Related Concept Videos
Atomic Nuclei: Nuclear Relaxation Processes
Intermolecular Forces
Intermolecular Forces and Physical Properties
Van der Waals Interactions
Electrostatic Boundary Conditions in Dielectrics
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
Intermolecular Forces in Solutions
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...

