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Last week, Google published a paper called Quantum supremacy using a programmable superconducting processor, which brags about:

Our Sycamore processor takes about 200 seconds to sample one instance of a quantum circuit a million times—our benchmarks currently indicate that the equivalent task for a state-of-the-art classical supercomputer would take approximately 10,000 years.

How are the 10k years estimated?

gsamaras
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    if you don't get a good answer here you might be interested in asking this question on [quantumcomputing.SE](https://quantumcomputing.stackexchange.com/). Also, you might want to check out [this blog post by Aaronson](https://www.scottaaronson.com/blog/?p=4372). – glS Oct 23 '19 at 17:22
  • @glS I wasn't aware of that site of SE, thanks (also for the upvote & the blog)! – gsamaras Oct 23 '19 at 19:17

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