But how is uncertainty relevant to the conjectured application? Why isn't this reply from Buggman adequate?
"Forgive me if I'm wrong, but Heisenburg simply states that you can't know both the location and the velocity of a given subatomic particle at the same time--the more accurately you pin down one, the "fuzzier" the other gets. We can still accurately detect spin just fine, so how would this affect ansible communication?
That's certainly what Heisenburg states, but the nuances of it bring about all sorts of bizarre events. For instance, the fact that energy can be 'borrowed' to 'create' a virtual particle, which is then immediately annihilated. That is, unless you have an extremely strong field of some sort, such as a gravitational field. Heisenburg plus a black hole yields Hawking radiation, which blew my mind when I first read about it, and I've always been into particle physics. I still don't fully understand all the implications of Heisenburg, but I could have sworn that I read on NewScientist, or perhaps elsewhere, that Heisenburg was what prevents the use of quantum entanglement for communication purposes. My memory could certainly be failing me, and I'll have to see if I can dig up the article I'm thinking about.