Google thinks their evidence for quantum supremacy is airtight. Postdoctoral Fellow- L. In our paper we said that classical algorithms would improve in fact, Google invented the method used here for random circuit simulation in , and the methods for trading fidelity for computational costs in and — but the key point is that quantum technology improves exponentially faster. Discover special offers, top stories, upcoming events, and more. The same calculation would take even the best classical supercomputer 10, years to complete, Google estimates.