Fluctuations in Nonequilibrium Critical Phenomena
Non-equilibrium steady states are expected to differ from equilibrium states in many important respects, which can show up in fluctuation spectra that occur in these states as are revealed for instance in light scattering experiments.1 For instance, the absence of time-reversal symmetry in a steady state of fluid with heat flow leads to a difference in the peak heights of Stokes and anti-Stokes components of the Brillouin doublet.1,2 However, effects of this type of dissipative perturbations on fluctuation spectra are rather small under ordinary conditions, and only very recently has experimental evidence come out.2
KeywordsShear Flow Fluctuation Spectrum Critical Fluid Critical Fluctuation Light Scattering Experiment
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