Impossibility of superluminal communication: a simple quantum mechanical exercise

Daniel J. Gauthier

GianCarlo Ghirardi, Raffaele Romano

Recently, various new proposals of superluminal transmission of information have been suggested in the literature. Since the proposals make systematic use of 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 communication, we consider some of the most challenging proposals of this kind and we show why they cannot work.

Xiaobai Ai

G. C. Ghirardi, Raffaele Romano

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.

Gao Shan