One Dimensional Ballistic Multi-terminal Josephson Junctions

Andreev bound state spectra of multi-terminal Josephson junctions offer a versatile platform for realizing topologically non-trivial multi-dimensional band structures. These devices ideally require multiple superconducting electrodes to be coupled by a single few-mode scattering region. Previous efforts have predominantly focused on multi-terminal Josephson devices based on two-dimensional electron gases where transport can be modeled by considering a network of two-terminal junctions. In this work, we built these junctions using ballistic PbTe nanowires, which naturally allow for the coupling of multiple superconducting electrodes by a single gate tunable scattering region.