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Which of your favorite sci-fi tech seems achievable in a reasonable timeframe, say 100 years? (sh.itjust.works)
submitted 1 year ago by to c/asklemmy@lemmy.world
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[–] 0 points 1 year ago (9 children)

I'm familiar with quantum entanglement. It doesn't work because you have no way of affecting which state you'll measure, and thus what state the other particle will be in.

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  • [–] 0 points 1 year ago (8 children)

    Read the link posted. They already did it. In 2007. At a distance of 144km.

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  • [–] 3 points 1 year ago* (2 children)

    No they didn't, they sent a conventional signal that was encrypted with an entangled particle. Nothing was sent ftl, this is like if I had two boxes that I know have the same thing in them, an encryption key, and traveled across the world, and sent you a message, you have the other box, the information in that box didn't go ftl you just opened it later.

    there is no path to ftl communication here.

    have a basic video on the topic: https://www.youtube.com/watch?v=9oBiS_Yb9Ac

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  • [–] -1 points 1 year ago (1 child)

    The FTL is the sci-fi component that is the subject of the thread, the quantum entanglement communication part is the real world piece they actually got working.

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  • [–] 0 points 1 year ago (4 children)

    That wasn't FTL

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  • [–] 0 points 1 year ago (3 children)

    That's not the part you were trying to say couldn't be done. ;) You were trying to argue that quantum entanglement couldn't be used to communicate, clearly it can.

    The FTL bit is the science fiction premise of the thread. ;)

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  • [–] -2 points 1 year ago (2 children)

    That is indeed that bit I was saying couldn't be done. Entanglement alone can't be used to communicate; a signal has to be sent conventionally over the distance.

    The FTL bit is physically impossible, so it's not really "achievable in a reasonable time-frame"

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  • [–] 1 point 1 year ago (1 child)

    This you?

    I'm familiar with quantum entanglement. It doesn't work because you have no way of affecting which state you'll measure, and thus what state the other particle will be in.

    That's exactly the part they DID get working.

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  • [–] 1 point 1 year ago

    No, they did not. Someone finding away to choose the state a wave function collapses into would break quantum physics at a fundamental level. It would literally be the biggest upset in science in human history.

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