The Linearized Vlasov-Maxwell System as a Hamiltonian System

We present a Hamiltonian formulation for the linearized Vlasov-Maxwell system with a Maxwellian background distribution function. We discuss the geometric properties of the model at the continuous level, and how to discretize the model in the GEMPIC framework [1]. This method allows us to keep the structure of the system at the semi-discrete level. To integrate the model in time, we employ a Poisson splitting and discuss how to integrate each subsystem separately. We test the model against the full Vlasov-Maxwell model with a control variate method for noise reduction; the two chosen test-cases are the weak Landau damping and the Bernstein waves. Both test-cases exhibit the same physical properties for short simulations but our model enjoys better long-time stability and energy conservation due to its geometric construction. The model is implemented in the open-source Python library STRUPHY [2, 3].