28 citations · 191 across the 22 of their papers we have counts for
22 papers
From free-evolution to tomographic representation
Sergio Cordero, Ramón López-Peña, Eduardo Nahmad-Achar +3
We use the free evolution propagator to determine the quantum probability representation (i.e., the general expression of the tomogram) of any one-dimensional system described by a…
Geometric properties of qudit systems
J. A. López-Saldívar, O. Castaños, S. Cordero +2
We discuss in general how to geometrically visualize a qudit system, with a particular interest in thermal states. The principle of maximum entropy is used to study the geometric p…
Storing Quantum Information in a generalised Dicke Model via a Simple Rotation
R. López-Peña, S. Cordero, E. Nahmad-Achar +1
A method for storing quantum information is presented for -level atomic systems interacting dipolarly with a single radiation field. The method involves performing simple local…
Wigner Function Analysis of Finite Matter-Radiation Systems
E. Nahmad-Achar, R. López-Peña, S. Cordero +1
We show that the behaviour in phase space of the Wigner function associated to the electromagnetic modes carries the information of both, the entanglement properties between matter…
Geometry, quantum correlations, and phase transitions in the -atomic configuration
O. Castaños, S. Cordero, R. López-Peña +1
The quantum phase diagram for a finite -level system in the configuration, interacting with a two-mode electromagnetic field in a cavity, is determined by means of informati…
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…