This sounds like what's described here: https://www.quora.com/What-is-the-univer...

		cubefox 5 months ago \| parent \| context \| favorite \| on: Why haven't quantum computers factored 21 yet? This sounds like what's described here: https://www.quora.com/What-is-the-universal-quantum-computer... Perhaps this is what's already done in practice.