Quantum Error Correction
topic on 1 show · 6 statements across 3 episodes
the Y Combinator Startup Podcast
6 statements about Quantum Error Correction, every show
Aaronson: Quantum error correction turned scaling into an engineering challenge
“What changed everything for most of us in the nineties was the discovery of quantum error correction, right? And quantum fault tolerance. The upshot of which was if you want to build a scalable quantum computer, you don't need to get perfect qubits. That are p…”
Benjamin: Quantum codebreaking requires millions of physical qubits due to error correction
“Breaking codes is in the category of things that needs at least thousands of qubits. But because it's a big, tough, long-running task, it also needs this whole error correction thing to be going on. And that boosts the size of it, because once you say, oh, wai…”
Benjamin: 1990s quantum fault-tolerance threshold required 99.9999% fidelity
“And now the threshold when these results were first discovered in the nineties was about 10 parts per million. So I have a many nine, 99.9999 was the kind of level of precision that you would have to have in order to control your quantum computer and take the …”
Benjamin: Ancilla qubits detect errors without collapsing main quantum data
“Basically this trick of not looking for errors where they are, but looking to one side, because you've basically done a separate little calculation that now in the, what we call ancilla qubits, it tells you just one thing, the one thing you do legitimately nee…”
Preskill: Quantum error correction hides data from noise via entanglement
“So we have to encode the information so the environment, so to speak, can't find out anything about what the information is. And that's the idea of quantum error correction. If we encoded an entanglement, The environment is looking at the parts one at a time, …”
Preskill: Quantum error correction is now achievable in the laboratory
“But at first that was just kind of a theorist fantasy. It was a little too far ahead of The technology, but, you know, 20 years later, the technology is catching up, so now this idea of quantum error correction has become something you can do in the lab.”