# Improve Microwave Quantum Illumination Via Optical Parametric Amplifier

## TL;DR

This paper proposes a scheme to enhance microwave quantum illumination by introducing an optical parametric amplifier in a cavity optomechanical system, leading to improved detection of low-reflectivity objects in thermal backgrounds.

## Contribution

The paper introduces a novel method to increase entanglement and detection performance in microwave quantum illumination using an optical parametric amplifier.

## Key findings

- Enhanced entanglement between microwave and optical fields.
- Improved signal-to-noise ratio in detection.
- Reduced error probability for low-reflectivity objects.

## Abstract

Quantum illumination is a quantum-optical sensing technique in which an entangled source is exploited to improve the detection of a low-reflectivity object that is immersed in a bright thermal background. Entangled sources between microwave and optical fields can be exploited to improve detection in microwave quantum illumination technique. We proposed a scheme to enhance the entanglement between the output fields of microwave and optical cavity by introducing optical parametric amplifier medium in cavity optomechanical system. We show that improving signal-to-noise ratio and decreasing error probability of detection can be obtained consequently even for objects with low reflectivity in the presence of optical parametric amplifier.