Coherence analysis of the observed delayed-choice quantum eraser using coherent photons

Byoung S. Ham

doi:10.1117/12.3011033

13 March 2024 Coherence analysis of the observed delayed-choice quantum eraser using coherent photons

Byoung S. Ham

Proceedings Volume 12912, Quantum Sensing, Imaging, and Precision Metrology II; 1291214 (2024) https://doi.org/10.1117/12.3011033
Event: SPIE Quantum West, 2024, San Francisco, California, United States

Abstract

Quantum eraser is known as one of the mysterious quantum features, where the action of the delayed choice retrospectively determines the photon’s nature. Over the last decades, various photon characteristics have been used to demonstrate the quantum eraser, especially for violating the cause-effect relation. In this manuscript, recent observations of the quantum eraser based on a Mach-Zehnder interferometer (MZI) using an attenuated laser are speculated as the origin of the quantum mystery, where the delayed choice is conducted for the MZI output photons via polarization projection measurements. For this, the wave nature of a photon is taken for the present pure coherence optics-based analysis. By the definition of group velocity-based information, the violation of the cause-effect relation in the quantum eraser should be related to the ensemble coherence of measured photons, but not to individual photon’s coherence, where the ensemble coherence is dramatically decreased as the spectral bandwidth of the photon ensemble increases.

Conference Presentation

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

Citation Download Citation

Byoung S. Ham "Coherence analysis of the observed delayed-choice quantum eraser using coherent photons", Proc. SPIE 12912, Quantum Sensing, Imaging, and Precision Metrology II, 1291214 (13 March 2024); https://doi.org/10.1117/12.3011033

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