[WIP]Implement PSATD advance with the Picard implicit iterative solver #4662
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This implements use of the PSATD field advance coupled with the implicit Picard iterative solver, using a Strang split advance.
This requires the input parameter$\Delta E/E$ ~ 1.e-9 but will depend on parameters).
psatd.update_with_rho = 0
.With
psatd.periodic_single_box_fft = 1
, exact energy conservation is obtained. Otherwise good conservation is seen, but not exact (Convergence is found for wpedt <= 1.9 (compared to wpedt < 0.25 for FDTD).
Todo: