We consider the problem of identifying and estimating dynamical parameters of an ergodic quantum Markov chain, when only the stationary output is accessible for measurements. The starting point of the analysis is the fact that the knowledge of the output state completely fixes the dynamics up to an equivalence class of coordinate transformation TM consisting […]

Read More »

But troubling inconsistencies remained. These seemed to crystallize in “Elvira Daz’s” essays, and especially around her interpretation of Julio Cortzar’s Las Puertas del Cielo (The Gates of Heaven). In this short story from 1951, Cortzar described a lawyer whose friend’s girlfriend, Celine, has just died. Most of the shops and market stalls seem organized by […]

Read More »