Projective non-Abelian statistics of dislocation defects in a Z(N) rotor model

Article

关键词: QUANTUM COMPUTATION;    STATES;    ANYONS;   

DOI  :  10.1103/PhysRevB.86.161107

来源: SCIE

【 摘 要 】

Non-Abelian statistics is a phenomenon of topologically protected non-Abelian geometric phases as we exchange quasiparticle excitations. Here we construct a Z(N) rotor model that realizes a self-dual Z(N) Abelian gauge theory. We find that lattice dislocation defects in the model produce topologically protected degeneracy. Even though dislocations are not quasiparticle excitations, they resemble non-Abelian anyons with quantum dimension root N. Exchanging dislocations can produce topologically protected projective non-Abelian geometric phases. Therefore, we discover a kind of (projective) non-Abelian anyon that appears as the dislocations in an Abelian Z(N) rotor model. These types of non-Abelian anyons can be viewed as a generalization of the Majorana zero modes.

【 授权许可】

Free