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11 papers · 2 filters
Husimi distribution and phase space analysis of Dicke model quantum phase transition
E. Romera, R. del Real, M. Calixto
The Husimi distribution is proposed for a phase space analysis of quantum phase transitions in the Dicke model of spin-boson interactions. We show that the inverse participation ra…
The Husimi distribution, the Wehrl entropy and the superradiant phase in spin-boson interactions
R. del Real, M. Calixto, E. Romera
We study the Husimi distribution of the ground state in the Dicke model of field-matter interactions to visualize the quantum phase transition, from normal to superradiant, in phas…
Fisher information, nonclassicality and quantum revivals
E. Romera, F. de los Santos
Wave packet revivals and fractional revivals are studied by means of a measure of nonclassicality based on the Fisher information. In particular, we show that the spreading and the…
Parity-symmetry-adapted coherent states and entanglement in quantum phase transitions of vibron models
M. Calixto, E. Romera, R. del Real
We propose coherent (`Schrödinger catlike') states adapted to the parity symmetry providing a remarkable variational description of the ground and first excited states of vibron mo…
Husimi distribution and phase-space analysis of a vibron-model quantum phase transition
M. Calixto, R. del Real, E. Romera
The Husimi distribution is proposed for a phase space analysis of quantum phase transitions in the two-dimensional vibron model for -size molecules. We show that the inve…
Application of new Rényi uncertainty relations to wave packet revivals
Francisco de los Santos, Clara Guglieri, Elvira Romera
Wave packet revivals and fractional revivals are studied by means of newly derived uncertainty relations that involve Rényi entropies and position and momentum dispersions.