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Cake day: June 24th, 2023

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  • I’m mean life on Earth, obviously. No one is saying that the planet is going to explode or disappear or anything like that. We’re talking about the climate, and life that depends on that climate.

    And before you start coming at me with some “but but such and such life will still…” I’ll clarify again that there is a matter of scale here. A very large number of species that have been around for a very long time will soon be extinct (many have been lost already). So although we might still have mosquitos and jelly-fish for a long time to come, a lot of the complex life that is currently enjoying a comfortable and otherwise-sustainable life on Earth will no longer be able to do so; because of us. That’s what I’m referring to.

    Yes, humans have does this to ‘ourselves’, but we are nowhere near the worst effected life in this situation. In fact, most of the ill effects on humans are just knock-on effects from other life failing. (In particular, reduced capacity to grow food is likely to be a problem for humans.)



  • There are a few different physical systems that people are trying to build quantum computers with. Superconducting loops are one of the most promising ones, because of a halfway decent decoherence rate. And yeah, superconducts needing near 0K temperature to operate is a problem. It’s just hard to scale up while everything needs to be so cold. Room-temp superconductivity would be a huge advantage.

    But even then, the decoherence rates are still too high for any long quantum computation. Last I heard, the best qubits are maybe barely getting to good enough errors rates that quantum error correction would be possible - which is great, but ‘possible’ and ‘practical’ still have a significant gap between them.

    So in short, basically everything about the hardware needs to be better; and its just very very hard. Probably too hard to ever achieve the dream of having arbitrary quantum computation. (But there is always the possibility of some big new idea that makes everything work better.)