mdtraj.static_dielectric

mdtraj.static_dielectric(traj, charges, temperature)[source]

Calculate the static dielectric constant from a trajectory.

Parameters:
  • traj (Trajectory) – An mdtraj trajectory.

  • charges (np.ndarray, shape=(n_atoms), dtype=float) – Charges of each atom in the topology, expressed in units of the elementary charge constant.

  • temperature (temperature, float) – The temperature of interest, in units of kelvin.

Returns:

static_dielectric – The (unitless) relative static dielectric constant.

Return type:

float,

Notes

See eqn. (2) in 10.1021/jp3002383 or eqn. (7) in 10.1063/1.1476316 or https://github.com/gromacs/gromacs/blob/master/src/gromacs/gmxana/gmx_current.c#L622