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    Area of Science:

    • Quantum optics
    • Photonics
    • Quantum information science

    Background:

    • Airy beams are non-diffracting and self-accelerating beams with unique propagation dynamics.
    • Quantum entanglement is a fundamental resource for quantum technologies, enabling correlations between particles.
    • Previous research focused on classical Airy beams, with limited exploration in the quantum regime.

    Purpose of the Study:

    • To extend the concept of Airy beams into the quantum domain.
    • To generate and characterize entangled photons exhibiting Airy beam properties.
    • To explore the potential of entangled Airy photons for quantum communication applications.

    Main Methods:

    • Generation of entangled photons via spontaneous parametric down-conversion (SPDC).
    • Pumping the SPDC process with a classical Airy beam to create two-photon Airy states.
    • Characterization of the generated entangled photons' properties, including acceleration, diffraction, and correlations.

    Main Results:

    • Successfully generated entangled photons in a superposition of two-photon Airy states.
    • Demonstrated that entangled Airy photons retain the free acceleration and reduced diffraction characteristics of classical Airy beams.
    • Observed non-classical anti-correlations in the entangled Airy photons.

    Conclusions:

    • Entangled Airy photons represent a novel quantum resource with unique properties.
    • The demonstrated properties of entangled Airy photons are advantageous for high-dimensional free-space quantum communications.
    • This work opens new avenues for exploring quantum phenomena with tailored optical beams.