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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Virtual atom-photon bound states and spontaneous emission control.

Stefano Longhi

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    |May 1, 2025
    PubMed
    Summary

    This study explores transient atom-photon bound states in waveguide quantum electrodynamics, revealing methods to slow down atomic decay for quantum technology applications.

    Area of Science:

    • Quantum physics
    • Waveguide quantum electrodynamics (QED)

    Background:

    • Atomic radiation emission is influenced by the photonic environment and collective atom interactions in waveguide QED systems.
    • Atom-photon bound states, which prevent complete spontaneous atomic decay, are crucial for quantum technologies.
    • While steady-state bound states are understood, transient bound states are less explored.

    Purpose of the Study:

    • Investigate transient atom-photon bound states.
    • Explore methods to slow down spontaneous atomic decay using these transient states.

    Main Methods:

    • Utilizing initial atom-photon entanglement to create transient bound states.
    • Investigating waveguide dispersion engineering and giant atom concepts.

    Main Results:

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    • Demonstrated the existence and characteristics of transient atom-photon bound states.
    • Proposed novel methods for controlling and slowing spontaneous atomic decay.

    Conclusions:

    • Transient atom-photon bound states offer new avenues for quantum control.
    • Findings contribute to the development of advanced quantum technologies through manipulation of light-matter interactions.