Thermodynamic properties of the Dicke model in the strong-coupling regime

Abstract

We discuss the problem of a N two-level systems interacting with a single radiation mode in the strong-coupling regime. The thermodynamic properties of Dicke model are analyzed developing a perturbative expansion of the partition function in the high-temperature limit and we use this method to investigate the connections between the Dicke and the collective one-dimensional Ising model

7 pages, accepted for publication in EPJ B

References in corpus (2)

• Direct equivalence between quantum phase transition phenomena in radiation-matter and magnetic systems: scaling of entanglement
• First-order super-radiant phase transitions in a multi-qubit--cavity system

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• Overlap with the Separable State and Phase Transition in the Dicke Model: Zero and Finite Temperature
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