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Google gets an error-corrected quantum bit to be stable for an hour
(arstechnica.com)
This is a most excellent place for technology news and articles.
Welp, quantum computers have certain advantages (finding elements in O(sqrt(n)) time complexity, factorizing primes, etc). The difficulty is actually making everything stable because these machines are pretty complex.
https://en.wikipedia.org/wiki/Quantum_supremacy