Continuous-variable Gaussian analog of cluster states

Continuous-variable Gaussian analog of cluster states

Zhang, J. and Braunstein, S.L.
(2006): Physical Review A 73, 032318-1/5 (PDF)

ABSTRACT: We present a continuous-variable (CV) Gaussian analog of cluster states, a new class of CV multipartite entangled states that can be generated from squeezing and quantum nondemolition coupling HI=ħχXAXB. The entanglement properties of these states are studied in terms of classical communication and local operations. The graph states as general forms of the cluster states are presented. A chain for a one-dimensional example of cluster states can be readily experimentally produced only with squeezed light and beam splitters.