Electron teleportation in multi-terminal Majorana islands: Kondo effect at high temperature

TYPECondensed Matter Seminar
Speaker:Karen Michaeli
Location:Lidow Nathan Rosen (300)

Recent advances in growing complex structures of topological superconducting nanowires have paved the way for exploring new physics beyond the immediate application of finding Majorana modes.  In our work we studied setups involving a superconducting island with multiple Majorana modes connected to normal leads. I will explain how coherent effects give rise to a family of non-Fermi liquid states similar to the multiple channel Kondo problem. These states are remarkably stable and persist even in the resonant regime, defying conventional wisdom. As a direct consequence we predict a universal, gate-voltage independent conductance in these systems that develops at relatively high temperatures. Our results make the implementation of various devices more feasible, and we expect our observation to shift the paradigm in designing protocols for braiding Majorana modes and quantum computation away from focusing solely on the off-resonant regime.