Gadianton wrote:tobin wrote:Hardly, but I think it is the height of arrogance and stupidity to pretend we KNOW everything about the universe, how QM impacts the macro universe, and the laws and principles that apply to space-time. I think that is the front that DrW is pushing forward and I find it completely ridiculous at a very fundamental level. You seem to be repeating this argument and I really don't understand that. Do you really believe our current understanding of the macro universe Trump's quantum mechanics? I personally find such an approach to science and learning appalling. My view is that we don't have the full picture and it is still developing as we learn more about what is really going on and today's view is not necessarily 100% correct (nor do I think it is reasonable to assume that is the case).
tobin,
just for clarity here. If you check out that link I sent you from SEP, do you agree or disagree with its assessment that scientists are in general agreement that superluminal communication can't work? if you disagree, can you offer an example of a living scientist, employed at a real university who believes that it can work, with the right technology? I'm not saying there aren't any, I have no idea. But you mentioned something about scientists taking this idea seriously and I'm trying to understand who those scientists are, as my brief search efforts aren't turning up anything.
Gadianton, you aren't asking the right question. I don't think anyone is really trying to show that superluminal communication or traveling FTL is actually possible. That isn't what people are seriously looking at and I don't believe in that either. What I am talking about are proposals that there may be shortcuts through distortions in space-time at the quantum level that people think may exist and could use as a means of communication (or maybe travel). It is much as you fold a piece of two-dimensional paper through another dimension and bring two points together and could use that as a shortcut instead. As an example in our universe, we know that space-time is expanding so things are getting further apart FTL. It isn't that they are moving FTL, but instead are being spread apart FTL. So if you were able to reverse this expansion and instantly contract the space-time between those objects, they would instantly come together. Or if space-time is spongey (has holes in it between particles) at the quantum level, you could utilize these distortions to shorten the distance between objects to allow this type of instantaneous communication.
Now, as you noted, distorting space-time (or finding these distortions and utilizing them at the quantum level) may mean causality is not necessarily true. I'm ok with that, and I think many physicists are too since physics equations work perfectly fine forward and BACKWARDS. I believe, as do others, that causality is an imposition and not a universal law and some results in QM seems to indicate this is true.
Anyway, if you are interested in this topic and want to discuss it with people interested in it and do this professionally, I'd recommend visiting forums like the Physics Forum and asking questions. I think you'll find that there are a number of views on this and differing views about whether or not causality is necessarily true.
"You lack vision, but I see a place where people get on and off the freeway. On and off, off and on all day, all night.... Tire salons, automobile dealerships and wonderful, wonderful billboards reaching as far as the eye can see. My God, it'll be beautiful." -- Judge Doom