Nonclassicality and wave-particle duality in quantum interferometer

Chanseul Lee; Tai Hyun Yoon

doi:10.1117/12.3016880

10 June 2024 Nonclassicality and wave-particle duality in quantum interferometer

Chanseul Lee, Tai Hyun Yoon

Proceedings Volume 12993, Quantum Technologies 2024; 1299303 (2024) https://doi.org/10.1117/12.3016880
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

We propose a novel quantum interferometer based on two stimulated Parametric Down-Conversion (PDC) crystals seeded by weak coherent idler fields to investigate the relationship between the nonclassicality of the signal photon state and the fidelity of the conjugate idler photon state. We show that the purity of the signal photon state is tightly bounded by the entanglement between the signal photon and its conjugate idler photon, i.e., the fidelity of the idler state in the bipartite system, resulting in a novel complementarity relation for wave-particle duality. Moreover, we find that the nonclassical measure of the signal photon state is identical to the fidelity of the conjugate idler photon states prepared in each crystal. In our novel interferometer, the input beam splitter of the conventional SU(2) interferometer is replaced with two seeded SU(1,1) PDC systems that emit only a single photon at once from two crystals, thus producing an entangled superposition state where the conjugate idler photon states act as path detectors with controllable fidelity. We demonstrate that the presented quantum interferometer consisting of two stimulated PDC crystals positioned in parallel is an ideal setup for investigating and quantitatively understanding the complementarity relation of wave-particle duality.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Chanseul Lee and Tai Hyun Yoon "Nonclassicality and wave-particle duality in quantum interferometer", Proc. SPIE 12993, Quantum Technologies 2024, 1299303 (10 June 2024); https://doi.org/10.1117/12.3016880

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