quantum computer

also referred to as: quantum computers

14 statements across 3 episodes · 7 bullish · 1 bearish · 3 people on the record · first statement May 16, 2018 by John Preskill · across every show →

Everything said about quantum computer, oldest first

May 16, 2018 bullish
Prediction Held up
Preskill: Quantum computers will enable tabletop toy spacetime in decades
“And in particular, what we're going to be doing with quantum computers and, you know, the other quantum technologies that are Becoming increasingly sophisticated in the next couple of decades is we'll be able to control very well, highly entangled, complex qua…”
John Preskill May 16, 2018 ▶ 55:51 John Preskill on Quantum Computing · Y Combinator
May 16, 2018 negative
Assertion Supported
Preskill: Quantum computers can break both RSA and elliptic curve cryptography
“RSA, which is one of the ones that's widely used, as typically practiced today, the, to break it, you'd have to do something like factor a number, which is Over 2000 bits long to 20 48. And that's, you know, that's too hard to do now. But that's what quantum c…”
John Preskill May 16, 2018 ▶ 38:01 John Preskill on Quantum Computing · Y Combinator
May 16, 2018 bullish
Prediction Held up
Preskill: 50-to-100 qubit quantum computers will arrive in a couple years
“We think in a couple of years we'll have devices with about 50 qubits to a hundred, and we'll be able to control them pretty well, and that's an interesting range, because even though it's only 50 to a hundred qubits, doesn't sound like that big a deal, but th…”
John Preskill May 16, 2018 ▶ 19:48 John Preskill on Quantum Computing · Y Combinator
May 16, 2018 neutral
Assertion Supported
Preskill: Current quantum computers are too small for proposed algorithms
“We have algorithms that have been proposed, but, which we can't really run currently, because our quantum computers aren't big enough, on the scale that's needed to solve problems really, people really care about.”
John Preskill May 16, 2018 ▶ 18:05 John Preskill on Quantum Computing · Y Combinator
May 16, 2018 bullish
Prediction Open · timeframe May 2023
Preskill: Quantum computers will impact chemistry, carbon capture, and materials
“The Ones which will affect everyday life, I think, are better methods for understanding and inventing new materials, new chemical compounds. Things like that can be really important. You know, if you find a better way of capturing carbon by designing a better …”
John Preskill May 16, 2018 ▶ 14:32 John Preskill on Quantum Computing · Y Combinator
May 16, 2018 neutral
Prediction Not checkable as stated
Preskill: Quantum computers breaking public key crypto unlikely in 10 years, likely in 50
“I don't think, though I could be wrong, that we're likely to have quantum computers that can break those public key cryptosystems in 10 years. But in 50 years? Seems not unlikely.”
John Preskill May 16, 2018 ▶ 40:33 John Preskill on Quantum Computing · Y Combinator
May 25, 2018 neutral
Insight
Benjamin: Quantum applications needing fewer than 50 qubits can be simulated classically
“There's no point, if you think you've got a clever idea for what to use a quantum computer for, and that's going to change the world, if your idea involves much less than 50 qubits, you're wrong. Because, ah, you may have a very nice idea, but what we would do…”
Simon Benjamin May 25, 2018 ▶ 47:02 Simon Benjamin on Architectures for Quantum Computing · Y Combinator
May 25, 2018 neutral
Assertion Supported
Benjamin: Simulating 45 qubits classically requires 0.5 petabytes of RAM
“So, 45 qubits required 0.5. This wasn't my work. This was work elsewhere in the community. It required 0.5 half a petabyte of RAM, basically.”
Simon Benjamin May 25, 2018 ▶ 45:08 Simon Benjamin on Architectures for Quantum Computing · Y Combinator
May 25, 2018 bullish
Opinion
Benjamin: Modular architecture is the only viable route to rapid quantum scaling
“And in fact, this network approach is, I think the only one that if you wanted to Manhattan project it, right, or moonshot it, you're one of these big projects that have happened in the past where you have a goal that's extremely challenging and you just decid…”
Simon Benjamin May 25, 2018 ▶ 1:08:33 Simon Benjamin on Architectures for Quantum Computing · Y Combinator
May 25, 2018 neutral
Prediction Not checkable as stated
Benjamin: Building million-qubit quantum computers could take over a decade
“What we've worked out on paper is stuff that needs pretty big computers, and we don't know how long it would take to get there. You know, maybe, hopefully not decades, but it could take definitely more than a decade to get to the point where we have millions o…”
Simon Benjamin May 25, 2018 ▶ 49:39 Simon Benjamin on Architectures for Quantum Computing · Y Combinator
May 25, 2018 positive
Assertion Supported
Benjamin: Kitaev surface code is the go-to quantum computer architecture
“Especially something called the Kataev surface code, which is, at the moment, the go-to solution for how we would build a quantum computer.”
Simon Benjamin May 25, 2018 ▶ 17:58 Simon Benjamin on Architectures for Quantum Computing · Y Combinator
Jun 29, 2018 positive
Insight
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…”
Scott Aaronson Jun 29, 2018 ▶ 9:31 Scott Aaronson on Computational Complexity Theory and Quantum Computers · Y Combinator
Jun 29, 2018 positive
Opinion
Aaronson: Most important quantum computing use case is simulating nature
“Maybe the most important application that we know about is just giving us this new way to simulate nature, simulate physics and chemistry, and maybe discover new drugs, discover new materials, right?”
Scott Aaronson Jun 29, 2018 ▶ 11:36 Scott Aaronson on Computational Complexity Theory and Quantum Computers · Y Combinator
Jun 29, 2018 neutral
Insight
Aaronson: Quantum speedups require choreographing destructive interference for wrong answers
“The entire hope of getting a speed advantage from a quantum computer is to exploit the way that amplitudes work differently. It's to try to choreograph a pattern of interference Where for each wrong answer to your computational problem, like some of the paths …”
Scott Aaronson Jun 29, 2018 ▶ 5:23 Scott Aaronson on Computational Complexity Theory and Quantum Computers · Y Combinator
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