Fig. 6: Illustration of the proposed Majorana loop qubit.
From: Shadow-wall lithography of ballistic superconductor–semiconductor quantum devices
a Schematic of a single-nanowire loop-qubit device. The presumable locations of the MBS at the boundaries of the two hybrid segments are denoted by γi, where \(i\in \left\{1,2,3,4\right\}\). The electron parity is fixed due to the finite charging energy of the loop qubit. This configuration offers the desired ground-state degeneracy for a single qubit and can provide information on decoherence and quasiparticle poisoning. b False-colour SEM image of an InSb nanowire following the shadow-wall deposition. Two segments of the nanowire are covered with a superconducting 3-facet Al shell. These hybrid segments are interconnected via an Al loop running across the substrate.
