4 papers · 1 filter
Pair Filters in an Extended Hubbard Model at Resonance
Ensuo Ma, Zhi Song
We investigate the dynamics of bound pairs in an extended Hubbard model at resonance. We show that a single fermion and a singlet bound pair possess identical dispersion relations…
Exceptional nodal rings emerging in spinful Rice-Mele chains
E. S. Ma, Z. Song
The Weyl exceptional nodal lines usually occur in 3D topological semimetals, but also emerge in the parameter space of 1D systems. In this work, we study the impact of dissipation…
Dynamic destruction of magnetic order in a quantum Ising chain with oscillating transverse field
E. S. Ma, Z. Song
We study the dynamic response of magnetic domain walls in low-lying excited states of an Ising chain to an oscillating transverse field. Based on the exact instantaneous eigenstate…
Dynamically stable topological edge states in an extended Su-Schrieffer-Heeger ladder with balanced perturbation
E. S. Ma, K. L. Zhang, Z. Song
The on-site potentials may break the symmetry of a system, resulting in the loss of its original topology protected by the symmetry. In this work, we study the counteracting effect…