Jiuzhang (quantum computer)

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Jiuzhang is the first photonic quantum computer to attain quantum supremacy. Previously quantum supremacy has been achieved only once in 2019 by Google’s Sycamore, however Google's computer was based on superconducting materials, and not photons.[1]

Jiuzhang was developed by a team from University of Science and Technology of China (USTC) led by Pan Jianwei and . 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.[2] 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.[3]

References[]

  1. ^ Conover, Emily (2020-12-03). "The new light-based quantum computer Jiuzhang has achieved quantum supremacy". Science News. Retrieved 2020-12-19.
  2. ^ Ball, Philip (2020-12-03). "Physicists in China challenge Google's 'quantum advantage'". Nature. 588 (7838): 380. Bibcode:2020Natur.588..380B. doi:10.1038/d41586-020-03434-7. PMID 33273711.
  3. ^ December 2020, Rafi Letzter-Staff Writer 07 (7 December 2020). "China claims fastest quantum computer in the world". livescience.com. Retrieved 2020-12-19.
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