2021年
09/24
開催
開催日時
2021/09/24（金）15:00～16:00
開催場所
Online (Zoom)
講演者
佐藤 昌利 教授（京都大学基礎物理学研究所）
言語
English
詳細ページ
お問い合わせ
ryokokur-AT-post.kek.jp
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.