Figure 1
From: Role of Majorana fermions in high-harmonic generation from Kitaev chain
Notion of Majorana fermions in one dimensional chain. Two phases of the 1D superconducting Kitaev chain with open boundary: (a) the trivial phase has Majorana fermions (blue spheres) bound in pairs located on the same site of the physical lattice, represented by grey spheres. The other phase is (b) the topological phase, where Majorana fermions are bound in pairs located on the neighbouring sites leading to two unpaired Majorana fermions at both ends of the chain, represented by the red spheres. (c) The two unpaired Majorana at the ends of the chain again become bound in a pair when periodic or closed boundary condition is employed. (d) Lowest many-body excitation energy for \(L = 128\) as a function of \(|\mu /t_{0}|\).
