Quantum phase transition in the multi-mode Dicke model

Abstract

An investigation of the quantum phase transition in both discrete and continuum field Dicke models is presented. A series of anticrossing features following the criticality is revealed in the band of the field modes. Critical exponents are calculated. We investigate the properties of a pairwise entanglement measured by a concurrence and obtain analytical results in the thermodynamic limit.

7 pages, 3 figures

References in corpus (5)

• Quantum Phase Transitions and Bipartite Entanglement
• Entanglement in a second order quantum phase transition
• Concurrence in collective models
• Direct equivalence between quantum phase transition phenomena in radiation-matter and magnetic systems: scaling of entanglement
• Scaling behavior in the adiabatic Dicke Model

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