סמינר בחומר מעובה: Hidden orders in symmetry protected topological phases
Dr. Zohar Ringel, Oxford
Topological phases of matter are distinct from conventional ones by their lack of an order parameter. Still in the quantum Hall effect, a hidden order parameter exists and constitutes the basis for the celebrated composite-particle approach. Whether similar hidden orders exist in symmetry protected topological phases (SPTs) is a largely open question, especially in 2D and 3D. In this talk I will introduce a new approach to analyzing SPT groundstates, based on generalized Laughlin wavefunctions. Using it one obtains a simple picture of some classes of SPTs in 1D and 2D, in which hidden order is rather explicit. Future directions, in the lines of generalizing the composite-particle approach to SPTs, will be discussed briefly.
מארגן הסמינר: פרופ' שמשון ברעד