sarkas.utilities.maths.force_error_approx_pppm
sarkas.utilities.maths.force_error_approx_pppm#
- sarkas.utilities.maths.force_error_approx_pppm(potential)[source]#
Calculates the force error, \(\Delta F_{\rm pm}\), for the PPPM algorithm using approximations given in [Dharuman et al., 2017]. The formula for \(\Delta F_{\rm pm}\) can be found in Force Error.
- Parameters
potential (
sarkas.potentials.core.Potential) – Potential class with all the required information.- Returns
tot_force_error (float) – Total force error given by the L2 norm of the PP and PM force errors.
pppm_pm_err (float) – PM force error.
pppm_pp_err (float) – PM force error.