Anton Akhmerov

Abstract:

Hybrid devices combining superconducting physics with the tunability of mesoscopic semiconductors allow to realize a plethora of physical phenomena. This comes at the price of needing to precisely control the microscopic electronic behavior. I will focus on two loosely related phenomena, that can be realized in hybrid multiterminal Josephson junctions, and that are a subject of ongoing experimental search: topological energy-phase relationships, and supercurrent of charge 4e particles—Cooper quartets. Instead of the known hybrid implementation, I will demonstrate how to realize these phenomena by using conventional Josephson junctions as a building block. This simpler approach demonstrates previously overlooked physics of Josephson circuits, and paves the way towards the experimental observation of these phenomena.

Short bio:

During his PhD in Leiden, where Anton worked on graphene and topological insulators, he did a postdoc at Harvard and eventually started working in Delft University of Technology. He works at an interface between numerical simulations, hybrid superconductivity, and topology in condensed matter.