Fig. 2: Setup.
From: Fusion of Majorana bound states with mini-gate control in two-dimensional systems
a Straight and b V-shaped junction (SJ, VJ) formed by superconducting, S1,2,3, regions (blue), partially covering a 2D electron gas (yellow). The electron density in the uncovered part is locally tuned using mini-gate voltages, V1,2,3,4,5 (left to right). With a magnetic field Bx and superconducting phases, φ1,2,3, controlled by the external fluxes Φ, Φ1, Φ2, the chemical potential of the normal region, μN, is locally changed to support topological (orange) and trivial (green) regions, by imposing the mini-gate voltage V+ and V−. MBS γ1,2,3,4 (stars) form at the ends of the topological regions.
