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What about photonic quantum computers? You can access quantum mechanical effects at room temperature with photonics. I don’t know if it’s more difficult to use them for computing though

Yes, because photons don't interact with each other

Are you supporting or refuting my thesis? Assuming the latter, just because photons as particles don’t “interact” (by which I presume you mean they are bosons) doesn’t mean you can’t get interesting multi particle quantum results with photons. See for example https://en.m.wikipedia.org/wiki/Hong–Ou–Mandel_effect

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