Steven Chu is the William R. Kenan Jr. Professor of Physics and professor of molecular & cellular physiology in the School of Medicine. His has published over 275 papers in atomic and polymer physics, biophysics, biology and batteries, and holds 11 patents. Chu was the 12th U.S. Secretary of Energy from January 2009 through April 2013. His many awards include the 1997 Nobel Prize in Physics for contributions to laser cooling and atom trapping.