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Non-Adiabatic Effect in Topological and Interacting Charge Pumping
Fan Yang, Xingyu Li, Hui Zhai
Topological charge pumping occurs in the adiabatic limit, and the non-adiabatic effect due to finite ramping velocity reduces the pumping efficiency and leads to deviation from qua…
Symmetry-Preserving Quadratic Lindbladian and Dissipation Driven Topological Transitions in Gaussian States
Liang Mao, Fan Yang, Hui Zhai
The dynamical evolution of an open quantum system can be governed by the Lindblad equation of the density matrix. In this paper, we propose to characterize the density matrix topol…
Stability of Time-Reversal Symmetry Protected Topological Phases
Tian-Shu Deng, Lei Pan, Yu Chen +1
In a closed system, it is well known that the time-reversal symmetry can lead to Kramers degeneracy and protect nontrivial topological states such as quantum spin Hall insulator. I…
Hall Conductance of a Non-Hermitian Chern Insulator
Yu Chen, Hui Zhai
In this letter we study the Hall conductance for a non-Hermitian Chern insulator and quantitatively describe how the Hall conductance deviates from a quantized value. We show the e…
Machine Learning Topological Invariants with Neural Networks
Pengfei Zhang, Huitao Shen, Hui Zhai
In this Letter we supervisedly train neural networks to distinguish different topological phases in the context of topological band insulators. After training with Hamiltonians of…
Quantum Hall Transition near a Fermion Feshbach Resonance in a Rotating Trap
Kun Yang, Hui Zhai
We consider two-species of fermions in a rotating trap that interact via an s-wave Feshbach resonance, at total Landau level filling factor two (or one for each species). We show t…
Double-Layer Bose-Einstein Condensates with Large Number of Vortices
Hui Zhai, Qi Zhou, Rong Lv +1
In this paper we systematically study the double layer vortex lattice model, which is proposed to illustrate the interplay between the physics of a fast rotating Bose-Einstein cond…
Understanding of the Vortex Lattice Behavior Induced by Selective Removal of Atoms from a Bose-Einstein Condensate
Hui Zhai, Qi Zhou
It is known that the quantized vortices in a superfluid can be described by a dual electromagnetic model through the duality transformation. Recently a new technique, which can sel…