I'm not sure this adds much to the original thought experiment. Correct me if I'm wrong, but the idea behind Maxwell's Demon was to illustrate the notion of ad

I'm not sure this adds much to the original thought experiment. Correct me if I'm wrong, but the idea behind Maxwell's Demon was to illustrate the notion of adding information to the system to prevent/slow entropy (information being the decision to swing the trap door one way or the other). This article just seems to describe a physical device that sort of approaches that.