After 88 Years, KRISS Redetermines a Key Strontium Frequency with 50 Times Better Precision
Researchers at the Korea Research Institute of Standards and Science have re-measured the transition frequency of strontium atoms for the first time since 1938. Using a photonic grating chip, they achieved 50 times greater precision, which is critical for advancing quantum technologies like atomic clocks.
Why it matters
Improved precision in atomic measurements is foundational for the development of next-generation quantum computing and navigation systems.
Schematic of the two independent methods for measuring the strontium transition frequency using a photonic grating chip
(Up) Measuring the transition frequency through spatial analysis of strontium atomic fluorescence; (Down) Measuring the transition frequency through velocity analysis of atoms in a two-dimensional magneto-optical trap
The research team behind the strontium transition frequency measurement (From left: Jaewhan Lee, a graduate student at the KAIST Graduate School of Quantum Science and Technology; Dr. Jae Hoon Lee, Principal Research Scientist at KRISS; and Dr. Hyun Gyung Lee, Senior Research Scientist at KRISS)
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