Gaussian beam quantum radar protocol

TL;DR

This paper introduces a quantum radar protocol using entangled Gaussian beams, achieving a √N enhancement in detection sensitivity over classical radars by leveraging quantum entanglement in the frequency domain.

Contribution

The paper proposes a novel entangled Gaussian beam quantum radar protocol that improves detection sensitivity through quantum entanglement, extending quantum metrology principles to radar technology.

Findings

Achieves √N quantum enhancement in radar sensitivity

Uses entangled photons in frequency degrees of freedom

Demonstrates potential for improved radar detection performance

Abstract

We present an entangled quantum radar protocol. It consists in scanning the sky with a thin Gaussian beam and measuring the travel time of the radiation reflected from the target, as in conventional radars. Here the Gaussian beam is composed of $N$ photons entangled in the frequency degrees of freedom. We show that this provides a $\sqrt{N}$ quantum enhancement over the unentangled case, as is usual in quantum metrology.