Cluster states serve as the central physical resource for one-way quantum computing. We here present an experimental demonstration of the efficient cluster-state construction scheme proposed by Browne and Rudolph. In our experiment, three-photon cluster states with high purity are created from two Bell states via a qubit ``fusion'' operation, showing a strong violation of a three-particle Mermin inequality of ⟨A⟩=3.10±0.03. In addition, the entanglement properties of the cluster states are examined under σz and σₓ measurements on a qubit. This scheme could be extended to any desired number of qubits and represents an essential step for the optical one-way quantum computation.
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Zhang et al. (2006) studied this question.
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