111 citations · 513 across the 33 of their papers we have counts for
5 papers · 1 filter
Quantum phase transitions in the triangular coupled-top model
Liwei Duan, Yan-Zhi Wang, Qing-Hu Chen
We study the coupled-top model with three large spins located on a triangle. Depending on the coupling strength, there exist three phases: disordered paramagnetic phase, ferromagne…
Quantum walk for SU(1,1)
Liwei Duan
We propose a scheme to implement the quantum walk for SU(1,1) in the phase space, which generalizes those associated with the Heisenberg-Weyl group. The movement of the walker desc…
Ultrafast adiabatic passages in ultrastrongly coupled light-matter systems
Xun Gao, Liwei Duan, Pinghua Tang +4
We have obtained the solutions of the multimode quantum Rabi model when all modes have identical frequencies , including dark states with at least $(K=1,2,3,\l…
Unified approach to the nonlinear Rabi models
Liwei Duan
An analytical approach is proposed to study the two-photon, two-mode and intensity-dependent Rabi models. By virtue of the su(1,1) Lie algebra, all of them can be unified to the sa…
Quantum walk on the Bloch sphere
Liwei Duan
A scheme for implementing the discrete-time quantum walk on the Bloch sphere is proposed, which is closely related to the SU(2) group. A spin cluster serves as the walker, whereas…