Chemical Physics Alumnus Featured in Physics World: Entangled Aluminum Ion is World’s Best Timekeeper

Samuel M. Brewer (Ph.D. '12, Chemical Physics) was featured in Physics World, June 6. A member of NIST’s Ion Storage Group, Brewer built a quantum-logic clock using a positive ion of aluminum-27 as its timekeeper. The Group, located in Boulder, CO, conducts experiments on atomic ions that are confined in electromagnetic traps and laser-cooled, in some cases, to the ground state of motion.