Efimov Physics in Cold Atoms

TL;DR

This paper reviews Efimov physics in cold atoms, highlighting universal properties like Efimov trimers and their experimental observations, emphasizing the role of large scattering lengths in three-atom systems.

Contribution

It provides a comprehensive summary of universal Efimov physics in cold atoms, including recent experimental findings and theoretical insights.

Findings

Existence of Efimov trimers in three-atom systems

Log-periodic dependence of scattering observables

Experimental evidence of 3-atom loss processes

Abstract

Atoms with a large scattering length have universal low-energy properties that do not depend on the details of their structure or their interactions at short distances. In the 2-atom sector, the universal properties are familiar and depend only on the scattering length. In the 3-atom sector for identical bosons, the universal properties include the existence of a sequence of shallow triatomic molecules called Efimov trimers and log-periodic dependence of scattering observables on the energy and the scattering length. In this review, we summarize the universal results that are currently known. We also summarize the experimental information that is currently available with an emphasis on 3-atom loss processes.