Gaussian ensembles distributions from mixing quantum systems

In the context of the mixing dynamical systems we present a derivation of the Gaussian ensembles distributions from mixing quantum systems having a classical analog that is mixing. We find that mixing factorization property is satisfied for the mixing quantum systems expressed as a factorization of quantum mean values. For the case of the kicked rotator and in its fully chaotic regime, the factorization property links decoherence by dephasing with Gaussian ensembles in terms of the weak limit, interpreted as a decohered state. Moreover, a discussion about the connection between random matrix theory and quantum chaotic systems, based on some attempts made in previous works and from the viewpoint of the mixing quantum systems, is presented

How education shaped communist Cuba

F is for Fidel, Y is for Yanqui. This mantra used for teaching the alphabet in revolutionary Cuba shows just how far its educational divide with the U.S. has stretched. No sector illustrates better how Cuba and the U.S. have grown apart in over 50 years than education. Cuba claims today that its academic standards are among the highest in the world, and the country has educated tens of thousands of foreign students, mostly in medicine. U.S. policymakers know little about the methods used in Cuban education, nor what practical opportunities for collaboration in research and business might exist. With the agreement the two countries made last December to restore diplomatic relations, that may be about to change