Jun 23, 2017

> Has neutrino-based signalling been achieved or is it still a research topic?

An accelerator- or reactor-based neutrino experiment can detect whether the source is on or off, so in principle you can send binary information. This has been demonstrated using NuMI/MINERvA [1]. It's more of a novelty than anything practical.

[1] https://arxiv.org/abs/1203.2847