four_spin_states.m

Returns user-specified states for a system of four spin-1/2 particles; see also the enclosed Mathematica file.

Syntax

   rho=four_spin_states(spin_system,spins,spin_state)

Parameters

   spins      - a row vector of four spin numbers

   spin_state - one of the possible singlet-triplet
                product states, see the code

Outputs

   rho     - a density matrix (Hilbert space) or
             a state vector (Liouville space)

See also

deut_pair.m, equilibrium.m, partner_state.m, singlet.m, state.m, triplet.m, zftrip.m, Kernel_functions

Version 2.11, authors: Ilya Kuprov, Thomas Theis