Speaker : | Professor
Sankar Das Sarma University of Maryland, USA |

Topic : | Non-Abelian Anyons and Topological Quantum Computation |

Date : | December 28, 2007 |

Time : | 3:30 PM |

Venue : | C V Raman Hall, IACS |

All are cordially invited to attend

**Abstract: **Topological quantum computation has recently emerged as an
exciting way of carrying out fault tolerant quantum computation using non-Abelian
quasiparticle braiding in topological materials. I will discuss a number of
physical systems, e.g. fractional quantum Hall states, chiral p-wave superconductors,
p-wave cold atom superfluids, suitably designed optical lattices, rotating BEC
systems, etc. where the possibility for doing topological quantum computation
has been discussed in the recent literature. I will try to provide a perspective
on how realistic such ideas are likely to be and what the (very difficult) physics
issues are which would have to be addressed before laboratory topological quantum
computation can happen. I will also provide an introductory review of the basic
ideas underlying quantum topological matter, Abelian and non-Abelian anyons,
fractional quantum Hall effect, and quasiparticle braiding. The subject matter
of this lecture brings together quantum computation, topological quantum field
theory, materials science, conformal field theory, topology, string theory,
Jones polynomials, and quantum Hall effects. Basic concepts will be emphasized
in the lecture.

**About the Speaker:** Sankar Das Sarma is a Distinguished University Professor
at the University of Maryland where he also serves as the Director of the Condensed
Matter Theory Center at the Department of Physics. He is a theoretical condensed
matter physicist with wide expertise in many body theory and strong correlation
physics. Professor Das Sarma is internationally well-known for his work on electronic
properties of low dimensional systems, quantum Hall effects, spintronics, nonequlibrium
statistical mechanics, and quantum computation. His work has been highly cited
in the literature, and he is one of the ISI Highly-Cited Researchers. He received
his Ph.D. from Brown University and has been a professor at the University of
Maryland since 1982. He has earlier delivered the Rippon Lecture and the C.K.
Majumdar Memorial Lecture at IACS.