59 citations · 106 across the 5 of their papers we have counts for
7 papers · 1 filter
Distance-based degrees of polarization for a quantum field
A. B. Klimov, L. L. Sanchez-Soto, E. C. Yustas +2
It is well established that unpolarized light is invariant with respect to any SU(2) polarization transformation. This requirement fully characterizes the set of density matrices r…
Inequivalent classes of closed three-level systems
Andre B. Klimov, Hubert de Guise, Luis L. Sanchez-Soto
We show here that the and V configurations of three-level atomic systems, while they have recently been shown to be equivalent for many important physical quantities when drive…
On Discrete Quasiprobability Distributions
C. A. Munoz Villegas, A. Chavez Chavez, S. Chumakov +2
We analyze quasi probability distributions in discrete phase space related to the discrete Heisenberg-Weyl group. In particular, we discuss the relation between the Discrete Wigner…
Phase states for a three-level atom interacting with quantum fields
A. B. Klimov, L. L. Sanchez-Soto, J. Delgado +1
We introduce phase operators associated with the algebra su(3), which is the appropriate tool to describe three-level systems. The rather unusual properties of this phase are cause…
Effective Hamiltonians in quantum optics: a systematic approach
A. B. Klimov, L. L. Sanchez-Soto, A. Navarro +1
We discuss a general and systematic method for obtaining effective Hamiltonians that describe different nonlinear optical processes. The method exploits the existence of a nonlinea…
A description of entanglement in terms of quantum phase
Luis L. Sanchez-Soto, Julian Delgado, Andrei B. Klimov +1
We explore the role played by the phase in an accurate description of the entanglement of bipartite systems. We first present an appropriate polar decomposition that leads to a tru…