https://arstechnica.com/science/2019/10/inside-googles-quantum-computing-efforts/

SANTA BARBARA, California—Early this autumn, a paper leaked on a NASA site indicating Google engineers had built and tested hardware that achieved what's termed "quantum supremacy," completing calculations that would be impossible on a traditional computer. The paper was quickly pulled offline, and Google remained silent, leaving the rest of us to speculate about their plans for this device and any follow-ons the company might be preparing.