‘Nuclear Clock’ Breakthrough Enables Ultra-Precise Timekeeping

Physicists have advanced nuclear clock technology by measuring energy shifts in thorium-229 nuclei with unprecedented precision—100,000 times more accurate than before. This breakthrough, led by Jun Ye at JILA and published in Nature, uses a laser frequency comb synchronized with the world's most accurate clock. The development promises enhanced precision in timekeeping and insights into fundamental physics, including potential detection of dark matter effects.