2022 Gold Medal Award

Dr. Ye is recognized for exceptional advances in metrology that enabled measurement of the difference between the frequency of two optical atomic clocks at the 10^ -21 level. With this advance in clock operation, he resolved the gravitational redshift below the scale of a millimeter, an improvement of more than two orders of magnitude over the previous state of the art. His work represents a new standard of clock precision for probing the fundamental properties of space and time and demonstrates the practical importance of clock technology for quantum sensing and broader societal benefits.