 He received his PhD in theoretical physics from Brown University in 1979 as a doctoral student of John Quinn.In collaboration with Chetan Nayak and Michael Freedman of Microsoft Research, Das Sarma introduced the formula_1 topological qubit in 2005, which has led to experiments in building a fault-tolerant quantum computer based on two-dimensional semiconductor structures.Das Sarma's work on graphene has led to the theoretical understanding of graphene carrier transport properties at low densities where the inhomogeneous electron-hole puddles dominate the graphene landscape.