Thermodynamic properties of the Dicke model in the strong-coupling regime
Dipartimento di Fisica, Università della Calabria
INFN - Gruppo collegato di Cosenza, 87036 Rende (CS), Italy
Corresponding author: a firstname.lastname@example.org
Published online: 30 May 2005
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.
PACS: 42.50.Fx – Cooperative phenomena in quantum optical systems / 05.70.Jk – Critical point phenomena / 73.43.Nq – Quantum phase transition
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005