Physics Colloquium - Topological Quantum Computation with Majorana Wires

Event Date: 

Tuesday, December 1, 2015 - 4:00pm

Event Location: 

  • Broida 1640


Roman Lutchyn, UCSB CNSI and Microsoft Station Q


The largest fundamental barrier to building a scalable quantum computer is errors caused by de-coherence. Topological quantum computing evades this barrier by exploiting topological materials. He will discuss how to engineer topological superconductors at the interface of a conventional superconductor and a semiconductor with spin-orbit interaction. He will show that such a topological state emerging at the interface hosts Majorana zero modes. These quasi-particles, which are exotic in the sense that they are at the same time their own antiparticles, are effectively fractionalized objects (anyons) obeying non-Abelian exchange statistics. He will review recent experimental efforts in realizing and detecting Majorana zero-energy modes in one-dimensional nanowires, and will discuss the progress towards building the first topological qubit.