Superradiant first-order transitions in Dicke models with interacting matter are folds of one equation of state from the matter's magnetization response rather than crossings of disjoint sheets.
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cond-mat.str-el 2years
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Landau theory applied to the ferromagnetic Dicke-Ising model captures a tricritical point between second- and first-order transitions driven by virtual nearest-neighbor double spin-flip processes, establishing the model as a platform for quantum criticality above the upper critical dimension.
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Folds of one curve: the superradiant phase diagram of Dicke modes with interacting matter
Superradiant first-order transitions in Dicke models with interacting matter are folds of one equation of state from the matter's magnetization response rather than crossings of disjoint sheets.
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Quantum criticality of the ferromagnetic Dicke-Ising model
Landau theory applied to the ferromagnetic Dicke-Ising model captures a tricritical point between second- and first-order transitions driven by virtual nearest-neighbor double spin-flip processes, establishing the model as a platform for quantum criticality above the upper critical dimension.