Ground-state phase diagram of the quantum Rabi model

@article{Ying2015GroundstatePD,
  title={Ground-state phase diagram of the quantum Rabi model},
  author={Zu‐Jian Ying and Maoxin Liu and Hong-Gang Luo and Hai-Qing Lin and J. Q. You},
  journal={Physical Review A},
  year={2015},
  volume={92},
  pages={053823}
}
The Rabi model plays a fundamental role in understanding light-matter interaction. It reduces to the Jaynes-Cummings model via the rotating-wave approximation, which is applicable only to the cases of near resonance and weak coupling. However, recent experimental breakthroughs in upgrading light-matter coupling order require understanding the physics of the full quantum Rabi model (QRM). Despite the fact that its integrability and energy spectra have been exactly obtained, the challenge to… 
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