Experiments generate quantum entanglement over optical fibres across three real cities, marking progress towards networks that could have revolutionary applications.

    • DudeDudenson@lemmings.world
      link
      fedilink
      English
      arrow-up
      48
      ·
      6 months ago

      It pisses me off that they’re calling quantum data transmission quantum entanglement, it’s not the same thing and it’s misleading as fuck.

      Quantum entanglement is about two quantum particles sharing the same state which if implemented somehow would allow for universal communication with no time lag. Sending quantum state communication through fiber optic, while an achievement for distributed quantum computing, is not quantum entanglement!!

      • fed0sine@lemm.ee
        link
        fedilink
        English
        arrow-up
        10
        ·
        6 months ago

        Man, reading the title I thought quantum entanglement had finally arrived and I clicked that shit so fast 😂

      • VindictiveJudge@lemmy.world
        link
        fedilink
        English
        arrow-up
        8
        ·
        6 months ago

        Quantum entanglement communications also have fundamental problems that will likely render them effectively unusable. You need a key to decrypt anything you send, and the key has to travel no faster than c. It’s impossible to tell the data from the noise without the key. Attempting to read the data or to change the data being sent also collapses the effect, which can only be fixed by bringing the two systems together. In short, you can only send a single packet of data and you can’t use it without a key transmitted using traditional methods.

          • VindictiveJudge@lemmy.world
            link
            fedilink
            English
            arrow-up
            4
            ·
            6 months ago

            The limit is c because you have to use cables, radio, or other traditional methods to send the key. The data in the entangled pair would also have to be set at the time the two devices are constructed, so that’s not super useful. It might be useful for single use authentication, but that’s about it.

            Don’t think of entanglement as being like one object in two spots. Think of it like identical twins. One twin getting a hair cut does nothing to the other twin’s hair. Similarly, altering a property of one entangled particle does nothing to the other and actually means they are no longer entangled or identical.

  • Kairos
    link
    fedilink
    English
    arrow-up
    15
    arrow-down
    4
    ·
    6 months ago

    A quantum internet could enable any two users to establish almost unbreakable cryptographic keys to protect sensitive information

    We can already do that dumbass.

    • yeehaw@lemmy.ca
      link
      fedilink
      English
      arrow-up
      7
      ·
      6 months ago

      Ah, finally. Now we will stop talking about, hearing about, and shoving “AI” in everything and the next new thing will be “quantum internet enabled” things.

    • RecluseRamble@lemmy.dbzer0.com
      link
      fedilink
      English
      arrow-up
      7
      ·
      6 months ago

      I guess that’s far more unbreakable than what we have. But anyway, several three letter agencies will fight this (again) tooth and nails.

      • Kairos
        link
        fedilink
        English
        arrow-up
        4
        ·
        6 months ago

        This will be useful for militaries and corporations, not consumers. If it can’t work anywhere (or over a VPN, or wirelessly, etc.) It won’t work.

      • Kairos
        link
        fedilink
        English
        arrow-up
        3
        ·
        6 months ago

        I’m sorry. I realized in a comment below that one its very useful for governments/militaries and corporations.

  • QuadratureSurfer@lemmy.world
    link
    fedilink
    English
    arrow-up
    9
    ·
    6 months ago

    A very useful video that explains what Quantum Internet is… and what it isn’t:

    https://www.youtube.com/watch?v=u-j8nGvYMA8

    TL/DW: A big misconception here has to do with Quantum entanglement. Quantum Entanglement in Quantum Internet doesn’t mean that you can transfer data at speeds faster than light.

    It’s true that this connection would be “ultra secure” but this would be very inefficient (slow) and it wouldn’t be reliable in a noisy environment. It would probably be most useful for some sort of authentication protocol/key sharing.

  • ____@infosec.pub
    link
    fedilink
    English
    arrow-up
    1
    ·
    6 months ago

    “Almost unbreakable keys” - I’m not up to speed on what this race entails, relative to the current state of affairs. Does “almost” mean “any gov agency w/ a budget and quantum computers” can break it, it is it an actual step forward from the status quo?

    A question worth asking, in context of article.

    There’s not a ton of stuff I demand to be secure, full stop, but SSH and comms w/ my wife are among them. I need to dive deeper, and understand the actual risks.