Multiantenna Quantum Backscatter Communications

TL;DR

This paper introduces a multiantenna system to enhance quantum backscatter communication by synthetically increasing distinguishable modes, addressing the challenge of slow entangled microwave mode generation in quantum illumination.

Contribution

It proposes a multiantenna approach to improve quantum backscatter communication performance, overcoming the limitation of slow entangled microwave mode generation.

Findings

Enhanced distinguishability of modes in QBC

Potential for increased receiver sensitivity

Mitigation of microwave mode generation speed issues

Abstract

Quantum illumination (QI) is a revolutionary photonic quantum sensing paradigm that enhances the sensitivity of photodetection in noisy and lossy environments. The QI concept has been recently used to propose a quantum backscatter communication (QBC), with the aim of increasing the receiver sensitivity beyond the limits of its classical counterpart. One of the practical challenges in microwave QI is the slow rate at which the entangled microwave modes can be generated. Here, we propose to mitigate this problem by using a multiple-input multiple-output antenna system to synthetically increase the number of efficiently-distinguishable modes in the QBC context.