Physics Library, Room 223A, Physics Building

Dr. Ching-Kai Chiu, University of Maryland, College Park, presents, "Topological Quantum Matter With Symmetries."

Topological insulators and superconductors are fermionic systems with bulk energy gaps separating the valence and conduction bands. They possess gapless boundary states that are topologically protected and are related to physical quantities, such as quantized Hall conductivity. The 2016 Nobel Prize in physics has made this fact rather universally celebrated. One type of the topologically protected bound states leading to many implementations, such as non-abelian braiding and quantum computing, is Majorana bound states. A Majorana bound states, which is its own anti-particle, has zero energy protected by particle-hole symmetry stemming from superconductivity. In this talk, I will first review the family of topological phases by studying protected bound states and then focus on the recent development of topological nodal-line semimetals.

Refreshments will be served beginning at 3:30pm.