Using a Heterodyne Detection Scheme in a Subcarrier Wave Quantum Communication System

TL;DR

This paper explores a heterodyne detection scheme in subcarrier wave quantum communication systems to overcome limitations of single photon detectors, aiming to facilitate quantum networks with conventional photodetectors.

Contribution

It proposes a novel heterogeneous detection approach for subcarrier wave quantum communication, expanding possibilities for practical quantum network implementations.

Findings

Heterogeneous detection can be implemented in subcarrier wave systems.

Potential for using conventional photodetectors in quantum communication.

Improved signal registration without cryogenic cooling.

Abstract

The single photon detectors currently used in quantum communication schemes impose considerable restrictions on signal registration and dark count rates, require cooling to low temperatures, and are relatively expensive. Alternative approaches have recently been proposed that are based on the homogeneous and heterogeneous detection of quantum signals and can be used with conventional photodetectors. This work studies the possibility of obtaining a heterogeneous detection scheme in a subcarrier wave (also known as homodyne, self-homodyne or self-heterodyne detection methods for side band frequencies) quantum communication system that could be used to create quantum networks.