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Updated: May 25, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Local conversion of four Einstein-Podolsky-Rosen photon pairs into four-photon polarization-entangled
Hong-Fu Wang1, Shou Zhang, Ai-Dong Zhu
1Department of Physics, Yanbian University, Yanji, Jilin, China. hfwang@ybu.edu.cn
Abstract:
We propose a linear-optics-based scheme for local conversion of four Einstein-Podolsky-Rosen photon pairs distributed among five parties into four-photon polarization-entangled decoherence-free states using local operations and classical communication. The proposed setup involves simple linear optical elements and non-photon-number-resolving detectors that can only distinguish between the presence and absence of photons, and no information on the exact number of photons can be obtained. This greatly simplifies the experimental realization for linear optical quantum computation and quantum information processing.
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