Measurement of an Efimov trimer binding energy in a three-component mixture of 6Li

TL;DR

This paper reports a precise measurement of an Efimov trimer binding energy in a three-component 6Li mixture, highlighting temperature effects and deviations from nonuniversal theoretical predictions.

Contribution

The study provides the first precise experimental measurement of Efimov trimer binding energy in a three-component Fermi mixture, revealing deviations from existing nonuniversal theories.

Findings

Binding energy measured via radio-frequency association

Temperature significantly affects measurement results

Observed deviation from nonuniversal theory predictions

Abstract

The binding energy of an Efimov trimer state was precisely determined via radio-frequency association. It is found that the measurement results significantly shift with temperature, but that the shift can be made negligible at the lowest temperature in our experiment. The obtained trimer binding energy reveals a significant deviation from the nonuniversal theory prediction based on a three-body parameter with a monotonic energy dependence.