  We introduce a new class of continuous-variable (CV) multipartite entangled
states, the CV cluster states, which might be generated from squeezing and
kerr-like interaction. The entanglement properties of these states are studied
in terms of classical communication and local operations. The quantum
teleportation network with cluster states is investigated. The graph states as
the general forms of cluster states are presented, which may be used to
generate CV Greenberger-Horne-Zeilinger states by simply local measurements and
classical communication. A chain for one-dimensional example of cluster states
can be readily experimentally produced only with squeezed light and
beamsplitters.
