Fig. 5: Mediated interaction coefficient across the resonance.
From: Mediated interactions between Fermi polarons and the role of impurity quantum statistics
The experimental results for \(\bar{f}{n}_{\uparrow }/{\epsilon }_{{{{\rm{F}}}}}\) for the FB (green circles) and FF (red squares) mixtures are compared with the static Fermi-liquid theory of equation (2) (dashed green and red lines for FB and FF, respectively) and with the corresponding microscopic many-body result (Supplementary Section II), assuming a density of dressed molecules equal to 2.5 times that of the impurities (solid green and red lines for FB and FF, respectively). The plot refers to the repulsive and attractive branches for negative and positive values of X, respectively. The error bars on \(\bar{f}{n}_{\uparrow }/{\epsilon }_{{{{\rm{F}}}}}\) correspond to the uncertainties of the linear fit and the errors on the Fermi energy. The error bars on X, smaller than the symbol size, represent the standard errors for each set of measurements.
