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At what temperature must Google keep the processor of its new supercomputer, D-Wave?

Answer: near absolute zero

Google's new supercomputer, called D-Wave and housed at the NASA Ames Research Center, contains a single quantum computing chip surrounded by a giant refrigeration system.

Google and project partners NASA and the Universities Space Research Association are using the computer to experiment with quantum processing to solve problems that draw on large suppositories of data. Google researchers published a paper on Dec. 7 demonstrating how "finite range tunneling" can provide computational advantage over traditional computers.