From kurzweilai.net:

Google* is developing a quantum computer that it believes will outperform the world’s top supercomputers, according to an August 31 New Scientist article and sourced to researchers contacted by the magazine.

Google’s ambitious goal is to achieve “quantum supremacy”— which would be achieved when “quantum devices without error correction can perform a well-defined computational task beyond the capabilities of state-of-the-art classical computers,” as the authors of an arXiv paper (open access) explain.

The task in this case: simulate the behavior of a random arrangement of quantum circuits in a 48-qubit grid, which would require 2.252 petabytes of memory, almost double that of the top supercomputer in the world.

 

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