We consider several subtle aspects of the theory of neutrino oscillations which have been under discussion recently. We show that the S-matrix formalism of quantum field theory can adequately describe neutrino oscillations if correct physics conditions are imposed. This includes space-time localization of the neutrino production and detection processes. Space-time diagrams are introduced, which characterize this localization and illustrate the coherence issues of neutrino oscillations. We discuss two approaches to calculations of the transition amplitudes, which allow different physics interpretations: (i) (...) using configuration-space wave packets for the involved particles, which leads to approximate conservation laws for their mean energies and momenta; (ii) calculating first a plane-wave amplitude of the process, which exhibits exact energy-momentum conservation, and then convoluting it with the momentum-space wave packets of the involved particles. We show that these two approaches are equivalent. Kinematic entanglement (which is invoked to ensure exact energy-momentum conservation in neutrino oscillations) and subsequent disentanglement of the neutrinos and recoiling states are in fact irrelevant when the wave packets are considered. We demonstrate that the contribution of the recoil particle to the oscillation phase is negligible provided that the coherence conditions for neutrino production and detection are satisfied. Unlike in the previous situation, the phases of both neutrinos from Z 0 decay are important, leading to a realization of the Einstein-Podolsky-Rosen paradox. (shrink)

The article analyzes the views on the philosophy of Azerbaijan Enlightenment, the famous Azerbaijani historian of philosophy of the XX century, Enver Mirzekulievich Akhmedov (1920-1984). E.Akhmedov was one of the first scientists who studied the Azerbaijan philosophy of enlightenment in stages and systematically. He briefly referred to the legacy of almost every author, thoroughly studied by him during the period of Azerbaijan Enlightenment. E.Akhmedov managed to create a general philosophical picture of the era of enlightenment in Azerbaijan, (...) which was formed from the beginning of the XIX century and went through a difficult path of development until the 20s of the XX century. Despite the fact that in his works on the history of philosophy he tried to preserve scientific objectivity as much as possible, there is an ideological line of that time in his legacy, which is observed among most of our scientists who conducted research in the field of social sciences during the Soviet period. This moment makes it impossible, without a critical approach, to comprehend within the framework of the modern scientific paradigm, the rich legacy of E.Akhmedov and other historians of philosophy of the Soviet era. The obligatory Marxist-Leninist line of the Soviet era, the search for materialism and atheism in every period and thinker of the history of philosophy, unfortunately, undermines the scientific objectivity of research at this stage. The interpretation of such factors in the legacy of E.Akhmedov and our other scientists, based on scientific and philosophical critical analysis, allows the works of our historians of philosophy of the Soviet period to remain relevant in our time. (shrink)