Condensed Matter Seminar: Multiterminal graphene-based Josephson Junctions - a playground for non-linear and quantum physics

Josephson junctions are at the heart of many quantum devices, including superconducting qubits. In multi-terminal Josephson junctions, several superconducting contacts are made to a common non-superconducting region. It has been predicted that these devices could emulate the electronic bands of a real crystal, including topological materials. 

In this talk, I introduce Josephson junctions and present our recent work on multi-terminal junctions made of graphene. Our main interest is the “multiplet” resonances, which are observed at commensurate voltages across the junctions. We show that these resonances could be established via a synchronization mechanism analogous to the classical dynamics of the Kapitza pendulum.