Complementarity relationship between coherence and path distinguishability in an interferometer based on induced coherence

2023/10/30 by Gerard J. Machado, Lluc Sendra, Machado, Gerard J. +5 · 1 citation
Physics and Astronomy · Engineering · #Mechanical and Optical Resonators #Photonic and Optical Devices #Force Microscopy Techniques and Applications

paper · pdf · doi:10.48550/arxiv.2310.19765

Abstract

We consider an interferometer based on the concept of induced coherence, where two photons that originate in different second-order nonlinear crystals can interfere. We derive a complementarity relationship that links the first-order coherence between the two interfering photons with a parameter that quantifies the distinguishing information regarding the nonlinear crystal where they originated. We show that the derived relationship goes beyond the single-photon regime and is valid for any photon-flux rate generated. We report experimental results in the low photon-flux regime that confirm the validity of the derived complementarity relationship.

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