Fig. 7: Outcome of the MBS fusion in a VJ.
From: Fusion of Majorana bound states with mini-gate control in two-dimensional systems
a Spectrum evolution for the operations A1– A4 as a function of the relevant mini-gate voltage. Red and black lines: evolution of finite-energy states into MBS inside the topological gap. E and F: the two MBS pairs (degenerate ground states) in the + + − + + configuration (before fusion). G and H: the ground and first excited states in the + + + + + configuration (after fusion). b Sum of the probability densities, ρP for E and F. c ρP for G. d sum of the ρP for G and H. e–g The same as b–d, but for charge densities, ρC. The dashed lines mark the N regions covered by the mini gates. ρP is normalized to its maximum. The (minimum, maximum) values in e–g are (−0.7, 0.5), (−0.02, 0.03), and (−1.9, 3.0), respectively. The parameters are taken from Fig. 6.
