PM_ME_VINTAGE_30S [he/him]

Anarchist, autistic, engineer, and Certified Professional Life-Regretter. If you got a brick of text, don’t be alarmed; that’s normal.

No, I’m not interested in voting for your candidate.

  • 2 Posts
  • 47 Comments
Joined 1 year ago
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Cake day: July 9th, 2023

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  • Not at all. In a classical computer, the memory is based on bits of information which can either[1] in state 0 or state 1, and (assuming everything has been designed correctly) won’t exist in any other state than the allowed ones. Most classical computers work with binary.

    In quantum computing, the memory is based on qubits, which are two-level quantum systems. A qubit can take any linear combination of quantum states |0⟩ and |1⟩. In quantum systems, linear combinations such as Ψ = α|0⟩ + β|1⟩ can use complex coefficients (α and β). Since α = |α|e^jθ is valid for any complex number, this indicates that quantum computing allows bits to have a phase with respect to each other. Geometrically, each bit of memory can “live” anywhere on the Bloch sphere, with |0⟩ at the “south pole” and |1⟩ at the “north pole”.

    Quantum computing requires a whole new set of gates, and there’s issues with coherence that I frankly don’t 100% understand yet. And qubits are a whole lot harder to make than classical bits. But if we can find a way to make qubits available to everyone like classical bits are, then we’ll be able to get a lot more computing power.

    The hardware works due to a quantum mechanical effect, but it is not “quantum” hardware because it doesn’t implement a two-bit quantum system.

    [1] Classical computers can be designed with N-ary digit memory (for example, trinary can take states 0, 1, and 2), but binary is easier to design for.


  • EE major here. All the equations in the third panel are classical electrodynamics. To explain the semiconductors needed to make the switches to make the gates in the second picture, you really need quantum mechanics. You can get away with “fudged” classical mechanics for approximate calculations, but diodes and transistors are bona fide quantum mechanical devices.

    But it’s also magic lol.






  • I actually quite like Fusilli (although I know it as Rotini). And really I meant to say penne rigate, i.e. penne with ridges. Penne Lisce and Ziti are C tier at best. Fusilli and Penne Rigate both have sauce-friendly shapes.

    Personally, I like my pastas cylindrical because the sauce can take advantage of the topology of the noodle (it has a hole where the sauce can go inside). It seems like Fusilli attempts to solve the problem with a simpler topology, i.e. by basically twisting a flat noodle. And it does a great job at it!