Comparison of spectral linewidths for quantum degenerate bosons and fermions

R. P. M. J. W. Notermans, R. J. Rengelink, W. Vassen

We observe a dramatic difference in optical line shapes of a ${}^4\text{He}$ Bose-Einstein condensate and a ${}^3\text{He}$ degenerate Fermi gas by measuring the 1557-nm $2{}^{3}S-2{}^{1}S$…