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The cluster states and Greenberger-Horne-Zeilinger (GHZ) states are twodifferent types of multipartite quantum entangled states. We present the firstexperimental results generating continuous variable quadripartite cluster andGHZ entangled states of electromagnetic fields. Utilizing four two-modesqueezed states of light and linearly optical transformations, the two types ofentangled states for amplitude and phase quadratures of light areexperimentally produced. The combinations of the measured quadrature variancesprove the full inseparability of the generated four subsystems. The presentedexperimental schemes show that the multipartite entanglement of continuousvariables can be deterministically generated with the relatively simpleimplementation

Experimental Preparation of Quadripartite Cluster and Greenberger-Horne-Zeilinger Entangled States for Continuous Variables