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Researchers, In China, May Have Developed A Photonic Quantum Computer, Called Jiuzhang, Which Demonstrates Quantum Supremacy. The Computer Is Said To Do, In 200 Seconds, Calculations That Will Take Conventional Computers 2.5 Billion Yrs To Complete. Only Google’s Sycamore Computer, Until Now, Has Been Able To Achieve Quantum Supremacy.

A quantum computer that measures light has achieved quantum supremacy | New Scientist

https://www.newscientist.com/article/2261906-a-quantum-computer-that-measures-light-has-achieved-quantum-supremacy/

A specialised quantum computer has achieved quantum supremacy, accomplishing in under 4 minutes what would take the biggest supercomputer 600 million years