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DY: Fachverband Dynamik und Statistische Physik

DY 15: Statistical Physics - general

DY 15.9: Talk

Tuesday, March 17, 2015, 11:45–12:00, BH-N 334

Equilibrium of a mesoscopic system in a damping induced inhomogeneous space — •Arijit Bhattacharyay — Indian Institute of Science Education and Research, Pune, India

Complex molecules like proteins, colloids etc can often have conformation dependent damping due to varied proximity of its constituents from each other at different conformational states. The dynamics of such systems in the conformation space, when in equilibrium with a homogeneous heat bath, is generally considered to be a stochastic dynamics with multiplicative noise. The origin of the multiplicative noise is related to the inhomogeneity of the conformation space caused by damping on top of which there can exist inhomogeneity of space caused by a conservative force field as usual. I would argue that, the equilibrium distribution of such systems has to be of a modified Maxwell-Boltzmann form resulting from a stochastic dynamics with additive noise. In this approach, putting the stochastic problem to an additive noise form would be the prerequisite for equilibrium. The results at the limit of constant damping would be recovered.