He arrived at
Georgetown University in 1994 as an assistant professor, promoted to associate professor in 1998, and full professor in 2002. He was made the inaugural Robert L. McDevitt, K.S.G., K.C.H.S and Catherine H. McDevitt, L.C.H.S. Chair in physics in 2010. He was awarded the
Oak Ridge Associated Universities Junior Faculty Enhancement Award (1995) and the
Office of Naval Research Young Investigator Award in 1996. He is a Fellow of the
American Physical Society (2006), having served as the treasurer and secretary of the Division of Computational Physics from 2012 to 2017. He was the Councillor for the Division of Computational Physics and the Topical Group on Big Data from 2020 to 2023. He is currently the treasurer of the
American Association of Physics Teachers and is the section representative of its Chesapeake section. He was named a Slater lecturer at the
University of Florida in 2019. He has served on the editorial boards of the
Nature journal
Scientific Reports,
Symmetry and the
American Journal of Physics. His early research focused on small cluster calculations for
strongly correlated materials. He then moved into the electron-phonon problem, examining
vertex corrections. He has worked on two projects with mathematical physicist
Elliott Lieb of Princeton, and other mathematical physics problems. He was one of the pioneers in
dynamical mean-field theory, working primarily on transport and other
response functions. He generalized
dynamical mean-field theory into nonequilibrium, and focused on examining
pump-probe experiments. He was part of the
DARPA optical lattice emulator program, which initiated his work with
ion trap simulators, including the first simulation in a
Penning trap with hundreds of qubits. More recently, he focused on working on how
quantum computing can be used to simulate real science problems (including a damped-driven simulation of 1000 Trotter steps) and how to re-envision how quantum mechanics is taught. == MOOC, Quantum Mechanics for Everyone ==