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Does Neven’s Law describe quantum computing’s rise? • Quanta Magazine
Kevin Hartnett:
<p>In December 2018, scientists at Google AI ran a calculation on Google’s best quantum processor. They were able to reproduce the computation using a regular laptop. Then in January, they ran the same test on an improved version of the quantum chip. This time they had to use a powerful desktop computer to simulate the result. By February, there were no longer any classical computers in the building that could simulate their quantum counterparts. The researchers had to request time on Google’s enormous server network to do that.

“Somewhere in February I had to make calls to say, ‘Hey, we need more quota,’” said Hartmut Neven, the director of the Quantum Artificial Intelligence lab. “We were running jobs comprised of a million processors.”

That rapid improvement has led to what’s being called “Neven’s law,” a new kind of rule to describe how quickly quantum computers are gaining on classical ones. The rule began as an in-house observation before Neven mentioned it in May at the Google Quantum Spring Symposium. There, he said that quantum computers are gaining computational power relative to classical ones at a “doubly exponential” rate — a staggeringly fast clip.

With double exponential growth, “it looks like nothing is happening, nothing is happening, and then whoops, suddenly you’re in a different world,” Neven said. “That’s what we’re experiencing here.”</p>

Double exponential (the exponent of the exponent) is shockingly fast. Though the problem with quantum computers is that until (unless) you can find room-temperature superconductors, they're going to be highly specialised kit, available only to a select few. Which poses its own kind of problem: who gets access?
quantumcomputing  quantum  computing 
21 hours ago by charlesarthur
Something Deeply Hidden: Quantum Worlds and the Emergence of Spacetime, Sean Carroll - Amazon.com
"“I was overwhelmed by tears of joy at seeing so many fundamental issues explained as well as they ever have been. Something Deeply Hidden is a masterpiece, which stands along with Feynman's QED as one of the two best popularizations of quantum mechanics I've ever seen. And if we classify QED as having had different goals, then it's just the best popularization of quantum mechanics I've ever seen, full stop.”
--Scott Aaronson, professor of computer science at the University of Texas at Austin,...
quantum  book 
yesterday by pmigdal
Help please Twitter! Can any expert advise on whether this is a reasonable representation of a for…
quantum  qubit  from twitter_favs
5 days ago by tolkien
The Era of Quantum Computing Is Here. Outlook: Cloudy | Quanta Magazine
Quantum computers should soon be able to beat classical computers at certain basic tasks. But before they’re truly powerful, researchers have to overcome a
quantum  computing 
7 days ago by thejaymo

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