  The N00N state, which was introduced as a resource for quantum-enhanced
metrology, is in fact a special case of a superposition of two SU(2) coherent
states. We show here explicitly the derivation of the N00N state from the
superposition state. This derivation makes clear the connection between these
seemingly disparate states as well as shows how the N00N state can be
generalized to a superposition of SU(2) coherent states.
