Fig. 1: Experimental setup and path length spectra.
From: Mean path length invariance in wave-scattering beyond the diffusive regime
a Sketch of the experimental setup, where the cavity is represented for a random arrangement of 40 aluminum cylinders. The top plate has been removed to visualize the interior of the sample. The embedded intensity distribution corresponds to the highest transmitting transmission eigenstate in this scattering configuration obtained from a numerical simulation. b Experimental data for the variation of the inverse of the statistical conductance, \((1/g^{\prime} )=3{\rm{var}}({s}_{a})/2\) as a function of the conductance g to estimate whether the experiment operates in the diffusive \([(1/g^{\prime} )\,<\,1]\) (green shaded area) or in the localized regime \([(1/g^{\prime} )\,> \, 1]\) (red shaded area)21. c Spectra of the mean path length s(ω) = s[2Qt(ω)] for a chaotic cavity (blue line), a diffusive sample with nscat = 100 scatterers (green line) and a localized sample with nscat = 280 scatterers (red line). The values of \(1/g^{\prime}\) corresponding to these samples are shown with red, green and blue markers in (b).
