Measuring decorrelation times for FCC 3D, soft spehere, NVE, T=0.005

I computed the auto-correlation of the projection of displacement fields on the longest wavelength plane wave for the 111 plane of my FCC, NVE ordered and disordered system.

NOTE: The autocorrelation was measured for the COMPLEX fourier coefficients and NOT the square amplitudes of the projection onto plane waves.


Based on the plots below, 10tau seems to be a reasonable time interval to sample statistically independent configurations.