mk

mk ostatnie wypowiedzi na forum i w komentarzach

26.04.2021 08:19
odpowiedz
mk
1

to jest w kółko powtarzana przez dziennikarzy nieprawda:
"możemy otrzymać możliwość komunikacji zachodzącej z niespotykanymi dotąd prędkościami"
i jeszcze gorsze:
"Prawa fizyki nie pozwalają np. na bezpośrednie sterowanie z Ziemi łazikiem na Marsie – tylko mechanika kwantowa może to umożliwić."

gorąco polecam:
en.wikipedia - No-communication_theorem

w wykładach S. Aaronson'a (dostępne z jego strony qclec.pdf) jest to pięknie ujęte:
"Imagine a hierarchy of possibilities for what the universe allows. Classical Local Realism is at the bottom. Here you only ever need to use classical probability theory when you have incomplete information about physical systems, and also signals propagate at most at the speed of light.
At the top of the hierarchy is the Faster-Than-Light (FTL) Science-Fiction Utopia, where Alice and Bob can communicate instantaneously, can travel faster than light, and so forth.
People tend to believe that reality must be one or the other. So when they read pop-science articles about how classical local realism doesn’t hold, they think, “OK, then we must live in the FTL sci-fi utopia.” Instead, the truth—according to quantum mechanics—is somewhere in between these two, and the distinction is so subtle that perhaps no science-fiction writer would ever have had the imagination to invent it.
We live in a world where there’s no classical local realism, but no faster-than-light communication either."

MK

post wyedytowany przez mk 2021-04-26 08:24:31

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