On a proposal of superluminal communication

TL;DR

This paper critically examines recent proposals for superluminal communication based on quantum mechanics and demonstrates why these methods are fundamentally infeasible.

Contribution

It adapts existing impossibility theorems to new quantum-based superluminal communication proposals and shows their limitations.

Findings

Recent proposals cannot achieve superluminal communication

Impossibility theorems remain valid in new quantum scenarios

Superluminal information transfer remains theoretically unfeasible

Abstract

Recently, various new proposals of superluminal transmission of information have appeared in the literature. Since they make systematic resort to recent formal and practical improvements in quantum mechanics, the old theorems proving the impossibility of such a performance must be adapted to the new scenario. In this paper we consider some of the most challenging proposals of this kind and we show why they cannot work.