Abstract

We report measurements showing the universal behaviour of the static structure factor and both the temperature and interaction dependence of pair correlations in a strongly interacting Fermi gas. We utilize Bragg spectroscopy to obtain the static structure factor by recording excitation spectra of trapped clouds of ultracold ⁶Li atoms. Our results show clear evidence of strong short-range pair correlations above the critical temperature for superfluidity through the BEC-BCS crossover and agree well with theoretical calculations.

© 2011 AOS