39 citations · 191 across the 17 of their papers we have counts for
14 papers · 1 filter
Hierarchic superradiant phases in anisotropic Dicke model
D. K. He, Z. Song
We revisit the phase diagram of an anisotropic Dicke model by revealing the non-analyticity induced by underlying exceptional points. We find that, from a dynamical perspective, th…
Coalescing hardcore-boson condensate states with nonzero momentum
C. H. Zhang, Z. Song
Exceptional points (EPs), as an exclusive feature of a non-Hermitian system, support coalescing states to be alternative stable state beyond the ground state. In this work, we expl…
Resonant generation of -wave Cooper pair in non-Hermitian Kitaev chain at exceptional point
X. M. Yang, Z. Song
We investigate a non-Hermitian extension of Kitaev chain by considering imaginary -wave pairing amplitudes. The exact solution shows that the phase diagram consists two phases w…
Spectral singularity in composite systems and simulation of a resonant lasing cavity
X. Z. Zhang, G. R. Li, Z. Song
We investigate herein the existence of spectral singularities (SSs) in composite systems that consist of two separate scattering centers A and B embedded in one-dimensional free sp…
Stimulated photon emission and two-photon Raman scattering in a coupled-cavity QED system
Ci. Li, Zhi. Song
We study the scattering problem of photon and polariton in a one-dimensional coupled-cavity system. Analytical approximate analysis and numerical simulation show that a photon can…
Sudden death of particle-pair Bloch oscillation and unidirectional propagation in a one-dimensional driven optical lattice
S. Lin, X. Z. Zhang, Z. Song
We study the dynamics of bound pairs in the extended Hubbard model driven by a linear external field. It is shown that two interacting bosons or singlet fermions with nonzero on-si…