A new type of quantum computer has proven that it can reign supreme, too.
A photonic quantum computer, which harnesses particles of light, or photons,
performed a calculation that’s impossible for a conventional computer, researchers in China report online December 3 in
Science. That milestone, known as quantum supremacy, has been met only once before, in 2019 by
Google’s quantum computer (
SN: 10/23/19). Google’s computer, however, is based on superconducting materials, not photons.
“This is the first independent confirmation of Google’s claim that you really can achieve quantum supremacy,” says theoretical computer scientist Scott Aaronson of the University of Texas at Austin. “That’s exciting.”
Named Jiuzhang after an ancient Chinese mathematical text, the new quantum computer can perform a calculation in 200 seconds that would take more than half a billion years on the world’s fastest non-quantum, or classical, computer.