Precision Measurement

In a recent CNN article, groundbreaking research led by JILA and NIST Fellow Jun Ye and his team was highlighted for its remarkable advancements in nuclear clock technology. The article emphasized how their work builds upon the pioneering efforts of scientists who embedded thorium-229 into crystals in 2023, allowing for enhanced signal tracking by suppressing noise from nuclear decay.

Jun Ye, a JILA and NIST Fellow and CU Boulder Professor of Physics, and his team have made headlines in Quanta Magazine for their groundbreaking work on nuclear timekeeping. Graduate student Chuankun Zhang led the team in observing a thorium-229 nuclear transition—an elusive process that could redefine how we measure time.

JILA's recent advancements in the precision of strontium optical lattice clocks have garnered significant recognition, with Physics World Magazine highlighting their achievement. The research team from JILA and the University of Colorado, Boulder, has set a new record in measuring the frequency of an optical lattice clock with an unprecedented systematic uncertainty of 8.1 × 10⁻¹⁹. This level of precision is equivalent to a fraction of a second over the entire universe age, underscoring the importance of this development in the field of atomic clocks.