A handout picture from October 2019 shows Sundar Pichai with one of Google's Quantum Computers in the Santa Barbara lab, California, U.S. Picture taken in October 2019. Alphabet Inc's Google said on Wednesday it had achieved a breakthrough in computing research by using a quantum computer to solve in minutes a complex problem that would take today's most powerful supercomputer thousands of years to crack. Google/Handout via REUTERS

A handout picture from October 2019 shows Sundar Pichai and Daniel Sank (R) with one of Google's Quantum Computers in the Santa Barbara lab, California, U.S. Picture taken in October 2019. Google researchers expect that quantum computers within a few years will fuel advancements in fields such as artificial intelligence, materials science, and chemistry. The company is racing rivals including IBM Corp and Microsoft Corp to be the first to commercialize the technology and sell it through its cloud computing business. Google/Handout via REUTERS

A handout picture from October 2019 shows a component of Google's Quantum Computer in the Santa Barbara lab, California, U.S. Picture taken in October 2019. "We're hoping that when people start using this and looking at performance stability and cloud interface, they'll get really excited about what we have to offer at Google," John Martinis, the company's chief scientist for quantum hardware, told reporters. Google/Handout via REUTERS

A handout picture from October 2019 shows Sundar Pichai and Daniel Sank with one of Google's Quantum Computers in the Santa Barbara lab, California, U.S. Picture taken in October 2019. The breakthrough was described in a paper https://www.nature.com/articles/s41586-019-1666-5#Sec4 published in science journal Nature. It followed weeks of controversy since a draft leaked over whether Google's claim of "quantum supremacy" was valid. Google/Handout via REUTERS

A handout picture from October 2019 shows Sundar Pichai with one of Google's Quantum Computers in the Santa Barbara lab, California, U.S. Picture taken in October 2019. IBM said a supercomputer employing a different set-up could solve the same challenge in under three days, while chipmaker Intel said "quantum practicality" remained years away. Google/Handout via REUTERS

A handout picture from October 2019 shows engineers putting cover on Quantum Computera component of Google's Quantum Computer in the Santa Barbara lab, California, U.S. Picture taken in October 2019. Google defended its position, but did not dispute rivals' contentions. It has manufactured a handful of chips with 54 'qubits', vastly more powerful than the standard 64-bit chip in many consumer devices. However, for the technology to be useful to customers it would need to make chips with thousands of qubits. Martinis said Google sees "a pathway" to a computer with 1,000 qubits and expressed confidence that it had a reliable process to make its new chip, dubbed Sycamore. Google/Handout via REUTERS