The Gyrokinetic Limit for the Two-Dimensional Vlasov–Yukawa System with a Point Charge

The Gyrokinetic Limit for the Two-Dimensional Vlasov–Yukawa System with a Point Charge

In this article, we study the asymptotic behavior of the two-dimensional Vlasov–Yukawa system with a point charge under a large external magnetic field. When the intensity of the magnetic field tends to infinity, we show that the kinetic system converges to the measure-valued Euler equation with a d...

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Bibliographic Details
Main Authors: Xianghong Hu, Xianwen Zhang
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Mathematics
Subjects:
the Vlasov–Yukawa system
large data
gyrokinetic limit
Euler equation
defect measure
Online Access:https://www.mdpi.com/2227-7390/13/2/320
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Summary:In this article, we study the asymptotic behavior of the two-dimensional Vlasov–Yukawa system with a point charge under a large external magnetic field. When the intensity of the magnetic field tends to infinity, we show that the kinetic system converges to the measure-valued Euler equation with a defect measure, which extends the results of Miot to the case of the Vlasov–Yukawa system. And compared with the Miot’s work, an important improvement is that our results do not require compact support conditions for spatial variables or uniform bound conditions for second-order spatial moments. In addition, the extra small condition for initial data is also not required.
ISSN:2227-7390

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