Jiuzhang (quantum computer)

Jiuzhang is the first photonic quantum computer to attain quantum supremacy. It was developed by a team from University of Science and Technology of China (USTC) led by Jian-Wei Pan and Chao-Yang Lu. The computer is named after "Jiuzhang suanshu", an ancient Chinese mathematical classic.
On 3 December 2020, USTC announced in "Science" that Jiuzhang successfully performed Gaussian boson sampling in 200 seconds, with a maximum of 76 detected photons. The USTC group estimated that it would take 2.5 billion years for the Sunway TaihuLight supercomputer to perform the same calculation. In addition to a quantum computational advantage, Jiuzhang has a Hilbert space 10 billion times larger than Google's superconductor-based Sycamore processor, and as such, is harder to simulate classically.