Rotating Majorana zero modes in a disk geometry

Article

关键词: QUANTUM;    SOLITONS;   

DOI  :  10.1103/PhysRevB.105.085417

来源: SCIE

【 摘 要 】

We study the manipulation of Majorana zero modes in a thin disk made from a p-wave superconductor, in order to understand their use as a building block for topological quantum computers. We analyze the second-order topological corner modes that arise when an in-plane magnetic field is applied, and we calculate their dynamical evolution when rotating the magnetic field, with special emphasis on nonadiabatic effects. We characterize the phase transition between high-frequency and near-adiabatic evolution using Floquet analysis. We show that oscillations persist even in the adiabatic phase because of a frequency-independent coupling between zero modes and excited states, which we have quantified numerically and analytically. These results show that controlling the rotation frequency can be a simple method to avoid the nonadiabatic errors originated from this coupling and thus increase the robustness of topological quantum computation.

【 授权许可】

Free