Local transformation of two EPR photon pairs into a three-photon W state
Abstract
We propose and experimentally demonstrate a transformation of two EPR photon pairs distributed among three parties into a three-photon W state using local operations and classical communication. We then characterize the final state using quantum state tomography on the three-photon state and on its marginal bipartite states. The fidelity of the final state to the ideal W state is 0.778 0.043 and the expectation value for its witness operator is -0.111 0.043 implying the success of the proposed local transformation.
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