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Rate of convergence to equilibrium for the spatially homogeneous Boltzmann equation with hard potentials

Abstract : For the spatially homogeneous Boltzmann equation with hard po- tentials and Grad's cutoff (e.g. hard spheres), we give quantitative estimates of exponential convergence to equilibrium, and we show that the rate of exponential decay is governed by the spectral gap for the linearized equation, on which we provide a lower bound. Our approach is based on establishing spectral gap-like estimates valid near the equilibrium, and then connecting the latter to the quantitative nonlinear theory. This leads us to an explicit study of the linearized Boltzmann collision operator in functional spaces larger than the usual linearization setting.
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https://hal.archives-ouvertes.fr/hal-00076709
Contributor : Clément Mouhot Connect in order to contact the contributor
Submitted on : Friday, May 26, 2006 - 4:53:52 PM
Last modification on : Tuesday, January 18, 2022 - 3:24:17 PM
Long-term archiving on: : Friday, November 25, 2016 - 11:01:29 AM

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Clément Mouhot. Rate of convergence to equilibrium for the spatially homogeneous Boltzmann equation with hard potentials. Communications in Mathematical Physics, Springer Verlag, 2006, 261, pp.629-672. ⟨10.1007/s00220-005-1455-x⟩. ⟨hal-00076709v2⟩

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