開始日時	2021/09/24　15:00
終了日時	2021/09/24　16:00
講演者	佐藤　昌利　教授（京都大学基礎物理学研究所）
会場	Online (Zoom)
連絡先	ryokokur-AT-post.kek.jp
言語	English
ウェブサイト

概要

We resolve several puzzles related to the electromagnetic response of topological superconductors in 3+1 dimensions. In particular we show by an analytical calculation that the interface between a topological and normal superconductor does not exhibit any quantum Hall effect as long as time reversal invariance is preserved. We contrast this with the analogous case of a topological insulator to normal insulator interface. The difference is that in the topological insulator the electromagnetic vector potential couples to a vector current in a theory with a Dirac mass, while in the superconductor a pair of Weyl fermions are gapped by Majorana masses and the electromagnetic vector potential couples to their axial currents.