Current density of Majorana bound states

It is known that a non-local complex fermion can be written in terms of two Majorana fermions. We exploit this fact to explain the system zero modes bound vortex and an anti-vortex, on surface topological insulator contact with s-wave superconductor, as fermion. Although current density single mode vanishes, by starting wave packet consisted positive negative energy fermions, we specify time-dependent oscillatory motion emerges system. also show amplitude frequency oscillations depend relative distance those modes. Therefore, observation considered signature Also, such depends between modes, it adjusted bring within resolution observations. Furthermore, indicate predicted reminiscent zitterbewegung effect.