Leaderboard

While Bangstrom continues to assume some sort of magical 'interaction' that does not involve any interaction, Eise has neatly summed up exactly what happens ... It is almost like there is no reality between measurements ( only probability amplitudes ). IOW, No ( ocal ) reality =/=> Non-local reality.

Sorry, @bangstrom, but now you crossed the border of an honest, argumentative discourse. I assume you have some ideological reasons, and that your ideology needs non-locality. Otherwise I cannot explain the huge misses you make here, and your derogation of Joigus' and Swansonts knowledge of QM. The no-communication theorem is derived from the formalism of QM, and is valid on all levels. If you observe something only one time, you cannot conclude that it has changed. In Bell-like experiments, Bob from his side does not notice anything special. He just gets random results, as if he is just doing experiments on some simple particle source. Only when Alice and Bob compare their lists (these cannot be send FTL), they notice that the correlations are stronger than any classical system allows. On the contrary. The problem is you do not understand modern QM. Einstein objected against the non-local 'odour' of QM, but since then, physicists have developed QM further, and e.g. came up with the no-communication theorem, which excludes any FTL communication (and effect, and influence, and ...). Invalidated? On the contrary, the conclusion of the article that seemed contradictory to relativity, was confirmed by Bell-like experiments: the QM depiction of the world that Einstein thought was too absurd to be true, turns out to be true. And still Zeilinger would rather give up realism than locality. That is clear if you would really read his book, understand his argumentation, instead of citing passages from his book that seem to support your position. Nope. Read, and understand what Zeilinger is saying: in short, if Alice does here measurement before or after Bob did, it describes two different experiments, which means different boundary conditions. As said before, of the five ways Zeilinger mentions that could explain Bell-like experiments, Zeilinger dismisses 'back in time propagation', instead refers, to the fact that they are different experiments. Maybe this has a connection, or is even an example of 'contextuality' as meant in the Kochen-Specker theorem? @joigus: do you think that is correct? So no outrage about the position of Gell-Mann, Susskind, Kracklauer, Sidney Coleman, etc.? In short, you are not able to show an authoritative text, that pleads for giving up locality instead of realism. Sigh... Using 'action' again. 'My experts' disagree with you, and Zeilinger explicitly prefers to give up on realism, instead of locality. I am afraid, you forgot again, that teleportation needs an additional classical communication channel. I think I am done here. Unless a Bell-Kochen-Specker-Bangstrom inequality is derived that can distinguish if we must abandon locality, and not realism, (and empirically tested of course), I rest my case. Your ideological glasses make you blind, blind as two perpendicular oriented polarisators behind each other.

Call me a optimist, I think Putin uses tac nukes solely as weapons of intimidation, not of war. He's not a complete idiot, and realizes that prevailing winds are likely to carry radioactive dust into Russia. The largest tac nukes yield ten kilotons, which is two-thirds the yield of Little Boy, at Hiroshima. Their use would be so monstrous that Russia would descend to the deepest depths of pariah status, even with allies. The people would suffer great hardship and it's very likely Putin would be disposed of, Lavrentiy Beria style. Not sure he's really terminally ill (the world should be so lucky), and he could fear an ignominious end.

He has zero chance of winning Ukraine. And he has an ego the size of the moon, and he's terminally ill. If he can't have what he wants - making the Russian Empire Great Again - he'll try to goad the rest of the world into dying with him. He may have some mad generals on his side, but getting killed faster than usual so who knows the mind-set of the officers coming up in their place? My bet - not the farm, just a small one - is that the upcoming top brass of the horribly abused Russian army will have had enough and assassinate the crazy bastard before he destroys the world. Hint to assassins: be very precise in the placement of that briefcase!

OK, thanks, I see now. Normally, automatic doors use a light beam that is interrupted by a body. Heat sensors don't work well, because weather causes too much variation in both air temperature and in hand temperature. So, as @Sensei says, it may use sound, so touching it would mess it up (make it "deaf") and it would not work.

Yeah, I was thinking along the same lines. Does this possibly make neutrinos a dark matter candidate again ?

I understand it could shed light (haha) on dark matter. If it's confirmed and has the right mass, or something, ........................