31 citations · 53 across the 2 of their papers we have counts for
5 papers
Multiple ground-state instabilities in the anisotropic quantum Rabi model
Xiang-You Chen, Liwei Duan, Daniel Braak +1
In this work, the anisotropic variant of the quantum Rabi model with different coupling strengths of the rotating and counter-rotating wave terms is studied by the Bogoliubov opera…
Quantum criticality of the Rabi-Stark model at finite frequency ratios
Xiang-You Chen, You-Fei Xie, Qing-Hu Chen
In this paper, we analyze the quantum criticality of the Rabi-Stark model at finite ratios of the qubit and cavity frequencies in terms of the energy gap, the order parameter, as w…
First-order and continuous quantum phase transitions in the anisotropic quantum Rabi-Stark model
You-Fei Xie, Xiang-You Chen, Xiao-Fei Dong +1
Various quantum phase transitions in the anisotropic Rabi-Stark model with both the nonlinear Stark coupling and the linear dipole coupling between a two-level system and a single-…
Generalized coherent-squeezed-state expansion for the quantum Rabi model
Xiang-You Chen, Yu-Yu Zhang, Hang Zheng
We develop a systematic variational coherent-squeezed-state expansion for the ground state of the quantum Rabi model, which includes an additional squeezing effect with comparisons…
Analytical solutions by squeezing to the anisotropic Rabi model in the nonperturbative deep-strong coupling regime
Yu-Yu Zhang, Xiang-You Chen
A novel, unexplored nonperturbative deep-strong coupling (npDSC) achieved in superconducting circuits has been studied in the anisotropic Rabi model by the generalized squeezing ro…