Entangled states and superradiant phase transitions

Journal Article · Mon Mar 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.032335· OSTI ID:21408404

Aparicio Alcalde, M; Cardenas, A H; Svaiter, N F; Bezerra, V B ^[1]

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1. Centro Brasileiro de Pesquisas Fisicas, Rua Dr. Xavier Sigaud 150, 22290-180, Rio de Janeiro, RJ (Brazil) and Departamento de Fisica, Universidade Federal da Paraiba, 58059-970, Joao Pessoa, PB (Brazil)

The full Dicke model is composed of a single bosonic mode and an ensemble of N identical two-level atoms. In the model, the coupling between the bosonic mode and the atoms generates resonant and nonresonant processes. We also consider a dipole-dipole interaction between the atoms, which is able to generate entangled states in the atomic system. By assuming thermal equilibrium with a reservoir at temperature {beta}{sup -1}, the transition from fluorescent to superradiant phase and the quantum phase transition are investigated. It is shown that the critical behavior of the full Dicke model is not modified by the introduction of the dipole-dipole interaction.

• OSTI ID: 21408404
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
COUPLING
DIPOLES
EMISSION
EQUILIBRIUM
FLUORESCENCE
INTERACTIONS
LUMINESCENCE
MULTIPOLES
PHASE TRANSFORMATIONS
PHOTON EMISSION
QUANTUM ENTANGLEMENT
THERMAL EQUILIBRIUM