2020 Arthur S. Flemming Award - Andrew Ludlow

Andrew Ludlow of the Time and Frequency Division at NIST’s Physical Measurement Laboratory, was honored for groundbreaking progress in time metrology. From the Flemming citation:

“Dr. Ludlow led the development of the most accurate and precise clocks ever constructed. These `optical clocks’ are based on ultra-stabilized lasers and are 100-1000 times more stable and accurate than today's standard atomic clocks and will replace them one day as the ultimate timekeepers. His clocks filled a technical gap needed for advances in high-speed electronics and communications and ultra-precise navigation. Dr. Ludlow and his team have set world records for atomic clock precision and accuracy. They have proven the usefulness of these new clocks for a variety of applications including advancing the nation's official time scale and searching for dark matter.“