Optical Communication Without Photons

TL;DR

This paper demonstrates that a quantum communication protocol claiming to transmit information without particles can also be implemented using classical methods, challenging the uniqueness of the quantum approach.

Contribution

It shows that the protocol by Salih et al. can be replicated classically, questioning its quantum exclusivity and implications for quantum communication.

Findings

Classical communication can replicate the protocol's effect.

Quantum protocol's advantage over classical methods is challenged.

The protocol's core idea is not uniquely quantum.

Abstract

I analyse a recent quantum communication protocol by Salih et al. that allows one to communicate without any particle carrying the information from the sender to the receiver. I show how this can equally be achieved using classical communication.