  I consider several interesting aspects of a new light source, a two-level
atom, or N two-level atoms inside an Optical Parametric Oscillator. We find
that in the weak driving limit, detection of a transmitted or fluorescent
photon generates a highly entangled state of the atom and the cavity. This
entanglement can be used with beamsplitters to create more complex quantum
states and implement teleportation protocols. Also, one can store a single
photon in the atoms, along the lines of recent slow and stopped light proposals
and experiments.
