IFIMAC+ICMM Joint Seminar Series focuses on cutting-edge research on condensed matter physics, bringing speakers from all over the world to our Cantoblanco Campus. All talks are streamed online. Some of them will be celebrated on campus and onsite participation will also be possible. You need to subscribe to our mailing list at the link provided below to get the links to the seminar room. https://listas-correo.uam.es/sympa/subscribe/seminarios-ifimac-icmm-l

Josephson versus Andreev: what can we do with only tunnel junction circuits?

Anton Akhmerov, Quantum Tinkerer group, Delft University of Technology, Delft, The Neatherlands

May 26th, 2022, 12:00 CEST


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.