43 citations · 165 across the 15 of their papers we have counts for
15 papers
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…
Optimal basis for the generalized Dicke model
S. Cordero, E. Nahmad-Achar, O. Castaños +1
A methodology is devised for building optimal bases for the generalized Dicke model based on the symmetry adapted variational solution to the problem. At order zero, the matter sec…
Geometry and Entanglement of Two-Qubit States in the Quantum Probabilistic Representation
Julio A. López-Saldívar, Octavio Castaños, Eduardo Nahmad-Achar +3
A new geometric representation of qubit and qutrit states based on probability simplexes is used to describe the separability and entanglement properties of density matrices of two…
Entanglement of extremal density matrices of 2-qubit Hamiltonian with Kramers degeneracy
A. Figueroa, O. Castanos, R. Lopez-Pena
We establish a novel procedure to analyze the entanglement properties of extremal density matrices depending on the parameters of a finite dimensional Hamiltonian. It was applied t…
Discretization of the density matrix as a nonlinear positive map and entanglement
Julio A. López-Saldívar, Armando Figueroa, Octavio Castaños +3
The discretization of the density matrix is proposed as a nonlinear positive map for systems with continuous variables. This procedure is used to calculate the entanglement between…
Evolution and entanglement of Gaussian states in the parametric amplifier
Julio A. López-Saldívar, Armando Figueroa, Octavio Castaños +3
The linear time-dependent constants of motion of the parametric amplifier are obtained and used to determine in the tomographic-probability representation the evolution of a genera…