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quant-ph2025★ 1 cited
-symmetric two-photon quantum Rabi models
Yi-Cheng Wang, Jiong Li, Qing-Hu Chen
We investigate two non-Hermitian two-photon quantum Rabi models (tpQRM) that exhibit symmetry: the biased tpQRM (btpQRM), in which the qubit bias is purely imaginary…
quant-ph2025★ 2 cited
Critical Spectrum and Quantum Criticality in the Two-Photon Rabi-Stark Model
Jiong Li, Qing-Hu Chen
We investigate the spectral properties and quantum criticality of the two-photon Rabi-Stark model. Using the exact solution of this model, we rigorously derive a condition for comp…