Work

Three-body interactions in Rabi-coupled Bose gases: A perturbative approach

Year: 2025

Type: article

Abstract: In ultracold atomic gases, radio-frequency coupling between two spin states can lead to atoms being in a stable coherent superposition of the two states (dressed states). When the two-body interactions (scattering lengths) are different between the two states, it offers the possibility not only to control the interatomic interaction but also to modify the equation of states with emerging three-body terms with different signs and scalings with the parameters. We derive these terms in a unified perturbation framework and show that they correspond to genuine three-body processes found at different orders in perturbation theory. Our work justifies the introduction of contact three-body interactions in dressed-state systems when the spin degree of freedom is integrated out.

Source: Physical Review A

DOI: 10.1103/physreva.111.053319

Authors: S. Tiengo, R. Eid, T. Bourdel

Institutions: Centre National de la Recherche Scientifique, Université Paris-Saclay, Institut d’Optique Graduate School, Laboratoire Charles Fabry

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Simons Foundation, Agence Nationale de la Recherche, Institut national des sciences de l'Univers

Awards: One-dimnesional out-of-equilibriumm quantum dynamics, G8285403722