Tunable Polarons in Bose-Einstein Condensates

TL;DR

This paper proposes a method to simulate and control polarons in ultracold atomic mixtures, enabling tunable interactions via laser parameters, which advances quantum simulation capabilities for strongly correlated systems.

Contribution

It introduces a theoretical scheme to tune polaron interactions in Bose-Einstein condensates using laser-driven Raman transitions, facilitating new quantum simulation experiments.

Findings

Tunable polaron interactions from attractive to zero.

Laser parameters control the effective polaron interactions.

Potential to simulate strongly correlated condensed matter models.

Abstract

A toolbox for the quantum simulation of polarons in ultracold atoms is presented. Motivated by the impressive experimental advances in the area of ultracold atomic mixtures, we theoretically study the problem of ultracold atomic impurities immersed in a Bose-Einstein condensate mixture (BEC). The coupling between impurity and BEC gives rise to the formation of polarons whose mutual interaction can be effectively tuned using an external laser driving a quasi-resonant Raman transition between the BEC components. Our scheme allows one to change the effective interactions between polarons in different sites from attractive to zero. This is achieved by simply changing the intensity and the frequency of the two lasers. Such arrangement opens new avenues for the study of strongly correlated condensed matter models in ultracold gases.