Phase Transitions in the Anisotropic Dicke-Stark Model with $A$-square terms

Abstract

The superradiant phase transition (SRPT) is forbidden in the standard isotropic Dicke model due to the so-called no-go theorem induced by A-square term. In the framework of the Dicke model, we demonstrate that SRPTs can occur at both zero and finite temperatures if we intrinsically tune the rotating wave and count-rotating atom-cavity coupling independently, and/or introduce the nonlinear Stark coupling terms, thus overcoming the no-go theorem. The phase transitions in this so-called anisotropic Dicke-Stark model share the same universality class with the original Dicke model. The critical coupling strength of this model decreases with the isotropic constant gradually, but can be driven to zero quickly with the strong nonlinear Stark coupling. We believe that we have proposed a feasible scheme to observe the SRPT in the future solid-state experiments.

6 pages, 6 figures

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Cited by in corpus (4)

• Superradiant phase transitions in the quantum Rabi model: Overcoming the no-go theorem through anisotropy
• Superradiant Phase Transition and Statistical Properties in the Dicke-Stark Model
• Emergence of Rich Dissipative Phases in the Anisotropic Quantum Rabi Model Driven by the $A^2$ Term
• Hierarchic superradiant phases in anisotropic Dicke model