报告题目：Bulk Thermoelectric and Thermodynamic Probes of non-Abelian Anyons in Topological Systems

报 告 人：Kun Yang，National High Magnetic Field Laboratory and Florida State University, U.S.A.

报告时间：12月19日16：00

报告地点：郑裕彤大讲堂

报告摘要：Topological states of matter support quasiparticle excitations with fractional charge and possibly exotic statistics of the non-Abelian type, known as non-Abelian anyons. Most current experimental attempts to reveal such exotic statistics focus on interference involving edge transport. After a brief introduction of topological states, in this talk we will discuss how one can reveal the non-Abelian quasiparticle statistics in bulk probes. We show that bulk thermopower is a promising way to detect their non-Abelian nature, and measure the quantum dimension (a key parameter that quantifies non-Abelian statistics) of these anyons. We also demonstrate a novel cooling effect associated with them. We discuss application of these ideas to the specific candidate system of fractional quantum Hall liquid at filling factor 5/2, and topological insulator-superconductor hybrid systems. Some of the predicted behavior has been observed in recent experiments, which will also be discussed.