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quant-ph2020
Multicriticality and quantum fluctuation in generalized Dicke model
Youjiang Xu, Diego Fallas Padilla, Han Pu
We consider an important generalization of the Dicke model in which multi-level atoms, instead of two-level atoms as in conventional Dicke model, interact with a single photonic mo…
quant-ph2019★ 36 cited
Emergent Universality in a Quantum Tricritical Dicke Model
Youjiang Xu, Han Pu
We propose a generalized Dicke model which supports a quantum tricritical point. We map out the phase diagram and investigate the critical behaviors of the model through exact low-…