  We present solutions of the time dependent Schrodinger equation for a SQUID
ring coupled to an electromagnetic field, both treated quantum mechanically. We
that show the SQUID ring can be used to create a maximally entangled state with
the em field that without dissipation remains constant in time. Using methods
familiar in quantum optics, we extend the model to include the effects of
coupling this system to a dissipative environment. With this model we show that
although such an environment makes a noticeable difference to the time
evolution of the system, it need not destroy the the entanglement of this
coupled system over time scales required for quantum technologies.
