[New breakthrough in quantum precision measurement Chinese scientific research team develops "nuclear optical clock"] October 7th, Tsinghua University recently teamed up with multiple domestic research teams to develop the first "nuclear optical clock" in the world, realizing quantum precision measurement from electronic transition to atomic nuclear transition, opening up new technical paths for a new generation of high-performance time and frequency benchmarks, deep space exploration and basic physics research. The international journal Nature published the research results today. According to reports, the "nuclear optical clock" is expected to be used in fields such as navigation and deep space exploration in the future to conduct more accurate positioning and distance measurement of satellites and spacecraft to serve the country's major needs.