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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
Indistinguishable photon pairs from independent true chaotic sources
Amir Nevet1, Alex Hayat, Pavel Ginzburg
1Department of Electrical Engineering, Technion, Haifa 32000, Israel. nevet@tx.technion.ac.il
Abstract:
Indistinguishability of events in quantum mechanics is manifested by interference between their probability amplitudes. We report a unique kind of interference occurring between indistinguishable events of photon-pair emission, where each photon of the pair is emitted from a distinct true chaotic light source and has a different energy. The indistinguishability results in an interference which is observed as an ultrafast modulation of the second-order coherence function, measured on a femtosecond time scale by two-photon absorption in a semiconductor photomultiplier tube.
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