CosinePotential #

Cosine potential is a periodic alternative of harmonic potential for dihedral angle interaction.

The functional form is the following.

\[U(v) = k\left(1 + \cos(n(v - v_0))\right)\]

Example #

[[forcefields.local]]
interaction = "DihedralAngle"
potential   = "Cosine"
topology    = "none"
parameters = [
    {indices = [0, 1, 2, 3], v0 = 1.57, k = 10.0, n = 1},
]

Input Reference #

k: Floating
- It determines the strength of the potential.
n: Integer
- It determines the number of minima in the potential.
v0: Floating
- It determines the position of minima.
indices: Array of Integers (length = 4)
- Indices of particles that interact with each other. The index is 0-based.
offset: Integer(Optional. By default, 0.)
- Offset of index.