30 citations · 154 across the 13 of their papers we have counts for
13 papers
Effect of the Atomic Dipole-Dipole Interaction on the Phase Diagrams of Field-Matter Interactions I: Variational procedure
Sergio Cordero, Octavio Castaños, Ramón López-Peña +1
We establish, within the second quantization method, the general dipole-dipole Hamiltonian interaction of a system of -level atoms. The variational energy surface of the -lev…
Quantum Phase Diagrams of Matter-Field Hamiltonians I: Fidelity, Bures Distance, and Entanglement
Sergio Cordero, Eduardo Nahmad-Achar, Ramón López-Peña +1
A general procedure is established to calculate the quantum phase diagrams for finite matter-field Hamiltonian models. The minimum energy surface associated to the different symmet…
The Structure of Phase Diagrams in Matter-Radiation Systems
Eduardo Nahmad-Achar, Sergio Cordero, Ramón López-Peña
We present a study of the structure of phase diagrams for matter-radiation systems, based on the use of coherent states and the catastrophe formalism, that compares very well with…
Extremal Density Matrices for Qudit States
Armando Figueroa, Julio A. López-Saldívar, Octavio Castaños +1
An algebraic procedure to find extremal density matrices for any Hamiltonian of a qudit system is established. The extremal density matrices for pure states provide a complete desc…
Variational Study of - and -Atomic Configurations Interacting with an Electromagnetic Field of Modes
S. Cordero, O. Castaños, R. López-Peña +1
A study of the - and -atomic configurations under dipolar interaction with modes of electromagnetic radiation is presented. The corresponding quantum phase diagrams are o…
Polychromatic phase diagram for -level atoms interacting with modes of electromagnetic field
Sergio Cordero, Eduardo Nahmad-Achar, Ramón López-Peña +1
A system of atoms of -levels interacting dipolarly with modes of electromagnetic field is considered. The energy surface of the system is constructed from the direc…