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Updated: Jun 23, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

A dissipative quantum mechanical beam-splitter.

S A Ramakrishna, A Bandyopadhyay, J Rai

    Optics Express
    |April 21, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Researchers modeled optical phonon excitation to analyze dissipative beam-splitters, revealing quantum interference can enable lossless designs. This breakthrough offers potential applications in laser optics and dielectric-coated mirrors.

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    Area of Science:

    • Quantum Optics
    • Solid State Physics

    Background:

    • Dissipative beam-splitters (BS) typically introduce signal loss.
    • Understanding loss mechanisms is crucial for optical device design.

    Purpose of the Study:

    • To model and analyze losses in a dissipative beam-splitter due to optical phonon excitation.
    • To investigate the potential for designing a lossless beam-splitter despite inherent dissipation.

    Main Methods:

    • Modeling BS losses via optical phonon excitation.
    • Treating loss as a perturbation on photon modes in a linear, non-lossy medium.
    • Employing second-order perturbation in the Markoff approximation.

    Main Results:

    • Derived Beer's law for absorption, providing a microscopic description of the absorption coefficient.
    • Observed increased fluctuations in photon modes due to losses.
    • Demonstrated quantum interference effects and loss quenching through phase correlations.

    Conclusions:

    • Despite dissipative media, a lossless 50-50 beam-splitter at normal incidence is achievable.
    • The findings have potential applications in laser optics and dielectric-coated mirrors.