# Orientation.m

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Anisotropic part of the Hamiltonian for a specific spin system orientation. Syntax:

H=orientation(Q,euler_angles)

Arguments:

Q - irreducible components of the anisotropic part, ordered by increasing spherical rank, and within ranks by decreasing projection quantum number - as returned by the hamiltonian.m function. euler_angles - a 1x3 vector or a vertical stack of 1x3 vectors specifying Euler angles (radians) relative to the input orientation.

Output:

H - anisotropic part of the Hamiltonian commutation superoperator (or a cell array thereof) for the specified Euler angles.

This function may be used in both Hilbert and Liouville space because the H -> [H, ] adjoint map is linear.

*Version 1.9, authors: Ilya Kuprov*