sarkas.potentials.force_pm.calc_pot_pm

sarkas.potentials.force_pm.calc_pot_pm(phi_r, mesh_pos, mesh_points, charges, cao, mesh_sz, mid, pshift)

Calculates the long range part of particles’ accelerations.

Parameters

• phi_r (numpy.ndarray) – Potential energy at mesh points.

• mesh_pos (numpy.ndarray) – Particles’ positions relative to the mesh.

• mesh_points (numpy.ndarray) – Particles’ positions on the mesh.

• charges (numpy.ndarray) – Particles’ charges.

• cao (int) – Charge assignment order.

• mesh_sz (numpy.ndarray) – Mesh points per direction.

• mid (numpy.ndarray) – Midpoint flag for the three directions.

• pshift (numpy.ndarray) – Midpoint shift in each direction.

Returns

pot_p (numpy.ndarray) – Potential energy of each particle.