Thermal and quantum phase transitions in atom-field systems: a microcanonical analysis
Thermal and quantum phase transitions in atom-field systems: a microcanonical analysis
The thermodynamical properties of a generalized Dicke model are calculated and related with the critical properties of its energy spectrum, namely the quantum phase transitions (QPT) and excited state quantum phase transitions (ESQPT). The thermal properties are calculated both in the canonical and the microcanonical ensembles. The latter deduction allows …