Quantum illumination reveals phase-shift inducing cloaking

TL;DR

This paper introduces a quantum illumination protocol tailored for microwave technology that detects phase-shifts caused by cloaking, achieving a 3 dB improvement over classical methods and applicable across various frequencies.

Contribution

The authors develop a quantum illumination protocol that specifically detects phase-shifts from cloaking techniques, enhancing detection capabilities beyond classical approaches.

Findings

Achieves 3 dB improvement in detecting cloaked targets.

Applicable to different frequency regimes and bright environments.

Identifies minimal detector efficiency for quantum advantage.

Abstract

In quantum illumination entangled light is employed to enhance the detection accuracy of an object when compared with the best classical protocol. On the other hand, cloaking is a stealth technology based on covering a target with a material deflecting the light around the object to avoid its detection. Here, we propose a quantum illumination protocol especially adapted to quantum microwave technology. This protocol seizes the phase-shift induced by some cloaking techniques, such as scattering reduction, allowing for a $3$ dB improvement in the detection of a cloaked target. The method can also be employed for the detection of a phase-shift in bright environments in different frequency regimes. Finally, we study the minimal efficiency required by the photocounter for which the quantum illumination protocol still shows a gain with respect to the classical protocol.