On the Electromagnetic Response of Topological Superconductors

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


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.