Google New "Bristlecone" Quantum Processor Eyes Quantum Supremacy

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Google New "Bristlecone" Quantum Processor Eyes Quantum Supremacy

Bristlecone is based on Google's previous 9-qubit linear technology, which demonstrated low error rates for reader, single qubit gates, and two-qubit rates.

Quantum supremacy The project was detailed in a blog post from Google's Research team this week, after its unveiling at the annual American Physical Society meeting in Los Angeles.

Google believes the Bristlecone proof of concept will provide the building blocks for larger quantum computing capabilties.

IBM made a 20-qubit processor available to clients in 2017 with plans to bring its 50-qubit prototype to next generation systems, and Intel rolled out a 49-qubit quantum test chip in January.

Quantum supremacy refers to the ability of a quantum computer to perform well-defined computational tasks better then advanced classical computers, without error correction.

Google's Quantum AI Lab has announced a new quantum computing chip called Bristlecone. This device uses the same scheme for coupling, control, and readout, but is scaled to a square array of 72 qubits.

Google believes that quantum supremacy is possible at 49 qubits, with a circuit depth higher than 40, and a two-qubit error rate less than 0.5%. In order to achieve the low error rate that the chip is capable of, it requires that all parts play nice together, from the software and control electronics, to the actual processor. Getting this right requires careful systems engineering over several iterations.

Google is tracking to a similar rate of qubit improvement. Google's computer is 22 qubits superior. System harmony Google recognises there are still significant challenges ahead.

Quantum computing is very different from classical computing-the type of mathematical gymnastics employed by your desktop while you're typing or playing a game.

It has developed a benchmarking tool for measuring error rates and said it wants to check Bristlecone's output against a simulation running on a conventional system.

The quantum volume measures the useful amount of quantum computing done by a device in space and time. The origin of a quantum computer's power is already subtle, and a quantum computer's performance depends on many factors that can make assessing its power challenging.