Post Scriptum: Tendency in Understanding the Foundations of Quantum Optics, Quantum Information, and Quantum Computing Technologies†

Abstract

We present a short discussion of the results presented in the contributions to the Special issue consisting of two parts and dedicated to the memory of Professor Stig Stenholm and Professor Jozsef Janszky. Our goal here is to provide a connection of these results with general problems in foundations of quantum mechanics. We discuss the relation of the developments in better understanding the foundations of quantum mechanics to its intuitively difficult notion of states and observables in such important systems as laser photons, oscillations realized by molecular vibrations, currents in superconducting circuits based on Josephson junction devices, and trapped ions with efforts in scientific activities like scientific collaborations of Russian, European, USA, and other institutions and organization of long-living series meetings like Central European Workshops on Quantum Optics (CEWQO) and International Conferences on Squeezed States and Uncertainty Relations (ICSSUR) with publications in international Scientific Journals. We present some discussions of the works of researchers and their results in the area of fundamental theory.