Chinese Photonic Quantum Computer Demonstrates Quantum Supremacy

Researchers In China Built And Tested A Photonic Quantum Computer That Demonstrates Quantum Supremacy.

Chinese Photonic Quantum Computer Demonstrates Quantum Supremacy
By Bob Yirka

In their paper published in the journal Science, the group describes their computer, which they call Jiuzhang, and how well it performed while conducting Gaussian boson sampling.

hich photons are sent into a circuit in parallel, and once inside, are split by beam splitters. The split photons continue through the circuit, encountering mirrors and other beam splitters. Notably, if two photons happen to encounter the same splitter simultaneously, both unsplit photons will follow one of the paths away from the splitter. The process is repeated, resulting in a distribution of numbers that represent the network output. Conventional computers become bogged down very quickly when trying to calculate distributions of such a system. Jiuzhang was built to handle 100 inputs and 100 outputs using 300 beam splitters and 75 mirrors.

The researchers found that it took Jiuzhang approximately 200 seconds to provide an answer. They noted that it would have taken the world’s fastest supercomputer approximately 2.5 billion years to carry out the same calculations—a clear example of quantum supremacy.

This news was originally published at PHY’s