Support for implicit solvent model based of finite difference solver of the Poisson equation

[zhenyuwei99]

Goal

Realizing finite difference solver for the Poisson equation in mdpy.

Requirements

• Dimension:
  • 2d
  • 3d
• Boundary condition
  • Dirichlet condition
  • Periodic boundary condition
• Architecture
  • CPU code based on scipy
  • GPU acceleration based on cupy
• Nonuniform dielectric permittivity