  Multipartite generalizations of spin coherent states are introduced and
analyzed. These are the spin analogues of multimode optical coherent states as
used in continuous variable quantum information, but generalized to possess
full spin symmetry. Two possible generalizations are given, one which is a
simple tensor product of a given multipartite quantum state. The second
generalization uses the bosonic formulation in the Jordan-Schwinger map, which
we call spinor states. In the unipartite case, spinor states are equivalent to
spin coherent states, however in the multipartite case, they are no longer
equivalent. Some fundamental properties of these states are discussed, such as
their observables and covariances with respect to symmetric operators, form
preserving transformations, and entanglement. We discuss the utility of such
multipartite spin coherent and spinor states as a way of storing quantum
information.
