Dissipative phase transitions of the Dicke-Ising model

• URL: http://arxiv.org/abs/2602.09912v1
• Date: Tue, 10 Feb 2026 15:44:02 GMT
• Title: Dissipative phase transitions of the Dicke-Ising model
• Authors: Jun-Ling Wang, Jiong Li, Qing-Hu Chen,
• Abstract summary: We study the dissipative phase transitions in the open transverse and longitudinal Dicke-Ising model (DIM)<n>Our results reveal that the interplay among spin interactions, light-matter coupling, and dissipation supports a diverse set of nonequilibrium phase transitions.<n>These findings offer a theoretical foundation for exploring nonequilibrium physics in realistic open solid-state quantum systems.
• Score: 2.4851820343103035
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The dissipative phase transitions in the open transverse and longitudinal Dicke-Ising model (DIM), which incorporates nearest-neighbor Ising-type spin interactions into the Dicke framework, are investigated within a mean-field approach and further validated by detailed stability analysis. While the dissipative phase diagram of the transverse DIM is only slightly shifted upward compared with its ground-state counterpart, dissipation in the longitudinal DIM stabilizes bistable nonequilibrium steady states and induces first-order phase transitions that are absent in the ground-state phase diagram. This bistable phase is characterized by the coexistence of superradiant and antiferromagnetic orders, and it converts a ground-state triple point into a tetracritical point, at which the boundaries of the first- and second-order transitions intersect. Our results reveal that the interplay among spin interactions, light-matter coupling, and dissipation supports a diverse set of nonequilibrium phase transitions and provides broad tunability of the phase diagram. These findings offer a theoretical foundation for exploring nonequilibrium physics in realistic open solid-state quantum systems.

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