The American Physical Society meeting that took place in Los Angeles, United States this week had Google presenting the newest 72-qubit quantum processor called “Bristlecone”. A research scientist at Google’s Quantum AI Lab, Julian Kelly said, “We are cautiously optimistic that quantum supremacy can be achieved with Bristlecone, and feel that learning to build and operate devices at this level of performance is an exciting challenge.”

The processor is an expanded version of their 9-qubit linear quantum and uses the similar style of coupling, readout and control but it uses a 72-qubit square array instead of linear array design. With Bristlecone, Google hopes to become the first company to have quantum supremacy which would allow quantum computers to handle problems that regular ones could not.

The chip requires more than a few tests to have low error rates however which is why Kelly said, “Operating a device such as Bristlecone at low system error requires harmony between a full stack of technology ranging from software and control electronics to the processor itself. Getting this right requires careful systems engineering over several iterations.”

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