He moved to Drexel from the University of Maryland where he was senior experimental postdoc of the UMD superconducting quantum computing group that first proposed the concept of the Josephson phase qubit, first coupled two phase qubits and first measured spectroscopic evidence of entanglement of two coupled phase qubits. While at the University of Washington, his graduate work led to mapping the liquid-vapor coexistence curve in monolayer helium mixtures. Recent work include entanglement in multiple coupled phase qubits, quantum-classical crossover in Josephson junctions, Berry's phase in qubits, resonant activation and sub-structure in differential conductance peaks in MgB2 junctions, graphene junctions and laser-induced defects in graphene.