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    Area of Science:

    • Quantum Optics
    • Quantum Information Science

    Background:

    • Non-degenerate squeezed light is crucial for quantum technologies like sub-shot-noise measurements and quantum illumination.
    • Existing applications often neglect the thermal properties of bipartite photon states, potentially limiting performance.

    Purpose of the Study:

    • To investigate the utility of maximally mixed quantum states in quantum applications.
    • To explore the potential of these states for information extraction and stealth capabilities.

    Main Methods:

    • Theoretical analysis of quantum light states generated in non-degenerate squeezers.
    • Modeling the interaction of these states with an environment for detection and camouflage.

    Main Results:

    • Demonstration that maximally mixed states can be leveraged for object position information extraction.
    • Showcasing the ability of these states to provide efficient camouflage against background noise.

    Conclusions:

    • Maximally mixed quantum states are not merely a nuisance but a valuable resource in quantum information processing.
    • This research opens new avenues for quantum sensing and secure communication by utilizing previously overlooked quantum states.