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Updated: Jun 23, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Local transformation of two einstein-podolsky-rosen photon pairs into a three-photon w state
Toshiyuki Tashima1, Tetsuroh Wakatsuki, Sahin Kaya Ozdemir
1Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan. tashima@qi.mp.es.osaka-u.ac.jp
Abstract:
We propose and experimentally demonstrate a transformation of two Einstein-Podolsky-Rosen 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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