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DTSTART:20250330T010000
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DTSTART;TZID=Europe/Paris:20251007T093000
DTEND;TZID=Europe/Paris:20251007T123000
DTSTAMP:20260420T035037
CREATED:20250930T111751Z
LAST-MODIFIED:20251006T134526Z
UID:19949-1759829400-1759840200@www.math.ens.psl.eu
SUMMARY:Kinetic Models\, Stability\, and Quasineutral Limits in Plasma Dynamics
DESCRIPTION:Title: Kinetic Models\, Stability\, and Quasineutral Limits in Plasma Dynamics \n\n\n\nSpeaker: Mikaela Iacobelli (ETH Zürich) \n\n\n\nAbstract Part I (mini-course): \n\n\n\nI will introduce kinetic models for collisionless plasmas\, focusing on Vlasov-type systems. I will discuss well-posedness and stability\, with emphasis on a method based on kinetic Wasserstein distances that respect the geometry of characteristics and the position-velocity anisotropy. This approach significantly improves stability estimates and provides a natural way to compare solutions along characteristics. The first part is self-contained and accessible to graduate students and non-specialists. \n\n\n\nAbstract Part II (research seminar): \n\n\n\nAfter a brief recap of models and notation\, I will turn to the quasineutral regime. \n\n\n\n(i) I will present almost-optimal stability for the quasineutral limit for the Vlasov-Poisson and Vlasov-Poisson with massless electrons\, obtained via stability-by-transport in kinetic Wasserstein distance together with refined control of the exponential Poisson coupling. \n\n\n\n(ii) For magnetized plasmas\, I will describe a new result on the quasineutral limit from the relativistic Vlasov-Maxwell system to electron-MHD in an analytic-regularity setting. Here the analysis provides estimates uniform in the quasineutral parameter and strong (filtered) convergence to the limiting dynamics.
URL:https://www.math.ens.psl.eu/evenement/mikaela-iacobelli/
LOCATION:Jussieu — salle 15-16-309\, 4 Place Jussieu\, Paris\, 75005
CATEGORIES:Séminaire Analyse non linéaire et EDP
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