Edge modes in a frustrated quantum Ising chain

Article

关键词: TRANSVERSE-FIELD;   

DOI  :  10.1103/PhysRevB.90.184416

来源: SCIE

【 摘 要 】

The ground state properties of an Ising chain with nearest (J(1)) and next-nearest neighbor (J(2)) interactions in a transverse field are investigated using the density matrix renormalization group and cluster mean-field theory methods. Its quantum phase diagram has two ordered regions (separated by a quantum disordered region), one of which has simple ferromagnetic or Neel order depending upon the sign of J(1), and the other is the double-staggered antiferromagnetic phase. The presence of the edge modes in these ordered phases is inferred by calculating the end-to-end spin-spin correlations on open chains. It is found that there occur four edge modes in the double-staggered phase, while the ferromagnetic and Neel phases support two edge modes, except very near J(1) = 0, where it seems they have four edge modes like the exact case at J(1) = 0 itself.

【 授权许可】

Free