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Joined 3 years ago
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Cake day: June 17th, 2023

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  • Whilst I’ve heard this idea said plenty of times by scientists as a way of demystifying the double slit and similar experiments, it doesn’t really do justice to the weirdness of the quantum world.

    Firstly in the “default” interpretation there’s no mechanism or explanation for how an observation causes wavefunction collapse, it’s just a rule that it just does that. And the collapse doesn’t correspond to a change in momentum of a particle or any other change in classical physical state, but something else entirely.

    In the double slit experiment a detector at one slit somehow seems to affect the particle as it leaves the source, before it reaches the detector (so the effect is backwards in time!) And without the detector it goes through both slits at once.








  • Took me a while to find out what I think these all are, still not 100% on some of them. From top left, going right:

    • Multiplication over the rationals
    • Wedge product / alternating product
    • Function composition (ring operator)
    • Inner product (e.g. scalar product)
    • Tensor product
    • Lie bracket
    • Set intersection
    • Vector product / cross product
    • Tor functor

    Corrections welcome!






  • At the risk of explaining what everyone here already gets: I like how the bottom picture could literally be a diagram of a 4-way deadlock where the buses are threads of execution and the roundabout exits are object locks.

    Whereas in top picture there are no passengers and I’m fairly sure the buses aren’t moving. Which probably says something about the state of the documentation