70 citations · 187 across the 11 of their papers we have counts for
4 papers · 2 filters
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…
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…
Searching for pairing energies in phase space
M. Calixto, O. Castaños, E. Romera
We obtain a representation of pairing energies in phase space, for the Lipkin-Meshkov-Glick and general boson Bardeen-Cooper-Schrieffer pairing models. This is done by means of a p…