• Captain Janeway@lemmy.world
    672·
    3 months ago

    The word “observed” has largely been conflated with human perception in the layperson’s understanding of quantum mechanics. When they were first experimenting with the dual slit experiment, they were simply trying to make measurements to predict where an electron might end up after entering one of the two slits. However they soon discovered that their measurements changed the behavior of the electron. That behavior has been denoted as an observation however observation is very vague.

    It’s better to say “a measurement which causes a wave-function collapse” rather than an observation. When phrased that way, it feels a lot more explicit and it allows lay people like myself to ask the next question “what causes a wave function to collapse?”

    Source: I just asked my physics PhD wife about this a couple nights ago and she did her best to explain it to me.

    If anyone can explain what exactly causes the wave function to collapse, id appreciate it. Because I can’t understand anything I read online.

    Also this meme checks out. A person could observe their CPU with the right conditions and instruments to cause a wave function collapse. But I believe a Qbit can reset its state no?

    • piecat@lemmy.world
      4·
      3 months ago

      Say you were a spy, and you think there’s a laser guarding the largest diamond in the world.

      There’s no way to detect if the laser is there without putting some form of matter in the way of the laser. Be it a hand, or spray bottle.

      Now at the museum, a mist won’t set off the alarm, but you’re still reflecting some of the photons out of the beam and into your eyes. Otherwise you wouldn’t see the beam…

      But for a quantum experiment, where we care about each individual photon, spraying a fine mist will affect the experiment. Sticking anything in that laser beam path will affect the measurement.

      So how do you make a measurement without interacting? As far as we know, you can’t.

    • DogWater@lemmy.world
      21·
      3 months ago

      For a mathless explanation, I believe it’s because in the quantum world all the atoms that interact are part of the same system. That includes the ones that make up the instruments and the scientists themselves. If you put the photons in an experimental apparatus the results can change because the system is different. Meaning you can influence the waveform collapse simply by experimenting to try and understand it.

      I hope that’s right I watch a ton of physics YouTube, so I hope I’m absorbing some of this stuff.

      For more crazy shit, see how photons traveling across the universe cause the electron they originate from at the start and the electron they terminate at the end to agree to exchange that energy across space and time. It’s mind bending. From the photon perspective (at the speed of light) a journey across the cosmos is instantaneous. No time passes for the photon from its frame of reference.

      On YouTube; PBS Spacetime, History of the universe, Alpha Phoenix, veritasium, cool worlds, astrum, vsauce

    • andros_rex@lemmy.world
      2·
      3 months ago

      The Schrödinger equation is a multi variable second order partial differential equation. You end up with a “position operator” and a “momentum operator” (momentum is mass times velocity, so we focus on the velocity bit). Because of the way that taking a partial derivative works, you end up applying one you can’t get the other.

      Idk that’s probably a terrible explanation (I got a C in that class lol), but it is really cool when you see how the math works.

      • Captain Janeway@lemmy.world
        10·
        3 months ago

        If you use your eyes, nothing happens. Most people think “observe” means they can just look at the experiment and expect it to change. That’s why so many people end up in metaphysics thinking their own perception has any impact on the outcomes of physical states. In reality, it makes no difference.

  • Slatlun@lemmy.ml
    26·
    3 months ago

    The computer is constantly both bricked and not bricked. No way to know until you push the power button