The American Physical Society (APS) Fellowship is an honor signifying recognition by one’s professional peers, awarded each year to less than one-half of 1% of APS members.

Each nominee is evaluated by the fellowship committee of the appropriate APS division, topical group or forum. After review by the APS fellowship committee, the successful candidates are elected by the APS Council.

This year, APS awarded fellowships to three scientists at the U.S. Department of Energy’s Argonne National Laboratory:

Jason Clark of the Physics division was elected for high-precision mass measurements critical to the understanding of nucleosynthesis and for development of improved techniques to enable such measurements.

Aashish Clerk of the Materials Sciences division was elected for fundamental contributions to the theory of quantum optomechanical systems, quantum dissipation engineering and other areas of quantum optics.

Paul Reimer of the Physics division was elected for important experimental insight into the structure of the proton, most notably in using the Drell-Yan reaction to measure the flavor dependence of the sea of antiquarks in the proton.