2021
09/24
OPEN
Date
2021/09/24（Fri）15:00～16:00
Venue
Online (Zoom)
Speaker
Prof. Masatoshi Sato (YITP）
Language
English
URL
Contact
ryokokur-AT-poat.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.