Recently it has been predicted that the Andreev bound state spectrum of 4-terminal Josephson junctions may possess zero-energy Weyl singularities. Using one superconducting phase as a control parameter, these singularities are associated with topological transitions between time-reversal symmetry broken phases with different Chern numbers. Here we show that such topological transitions may also be tuned with a magnetic flux through the junction area in a 3-terminal geometry.
@article{arxiv.1705.02478,
title = {Non-trivial Chern numbers in three-terminal Josephson junctions},
author = {Julia S. Meyer and Manuel Houzet},
journal= {arXiv preprint arXiv:1705.02478},
year = {2017}
}