Figure 1
From: Accurate thermal conductivities from optimally short molecular dynamics simulations
Sample power spectra of the heat flux computed from MD trajectories for Ar, H2O, a-SiO2 (\(100\,{\rm{ps}}\)) and MgO (\(500\,{\rm{ps}}\)) (gray line, see text). The solid lines in color correspond to a moving average performed over a narrow frequency window. The vertical arrows indicate the cutoff frequencies, \({f}^{\ast }\), used for the subsequent cepstral analysis (see text). The inset in the MgO panel is a magnification of the low-frequency region of the spectrum.
