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May 4, 20233:00 pm – 4:00 pm (CDT)

Postmodern kinetics. (Special Date and Time)


Gregory Falkovich (Weizmann)


A. Finkelstein



Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

Classical period have seen the derivation of kinetic equations by Boltzmann, Peierls and others, who also obtained their equilibrium and weakly non-equilibrium solutions. Modern kinetics appeared around 50 years ago when it was discovered that higher-order terms beyond the kinetic equations diverge at non-equilibrium. Those divergences were identified as memory effects and the leading divergences (ring diagrams) were effectively summed, which resulted in a singular perturbation theory for weakly non-equilibrium states and respective kinetic coefficients (viscosity, thermal conductivity, etc). Here I describe a new emerging kinetics dealing with far-from-equilibrium states of weakly interacting systems. We recently managed to identify the main multi-mode interactions and respective divergences, sum them (bubble diagrams) and derive the new renormalized kinetic equations which allow consistent description of far-from-equilibrium states like turbulence.

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