Papers by giuseppe giuliani
arXiv: Quantum Physics, 2020
A critical reconsideration of the EPR (Einstein-Podolsky-Rosen) paper shows that the EPR argument... more A critical reconsideration of the EPR (Einstein-Podolsky-Rosen) paper shows that the EPR argument can be developed without using the concept of `element of physical reality', thus eliminating any philosophical element in the logical chains of the paper. Deprived of its philosophical ornament, the EPR argument plainly reduces to require what quantum mechanics can not do: to assign definite values to two incompatible physical quantities. Hidden variables theories built up according to Bell - type theorems are formulated on the basis of the assumption that the locality condition implies the statistical independence between two measurements space - like separated. This assumption is valid only with the additional one that statistical dependence between two measurements requires a causal connection between them. This additional assumption rules out the possibility that statistical dependence may due to an intrinsic property of the physical system under study. Therefore, hidden variab...
Bookmarks Related papers MentionsView impact
The discovery of Electromagnetism by Ørsted (1820) initiated an “extraordinary decennium” ended b... more The discovery of Electromagnetism by Ørsted (1820) initiated an “extraordinary decennium” ended by the discovery of electromagnetic induction by Faraday (1831). During this decennium, in several experiments, the electromagnetic induction was there, but it was not seen or recognized. In 1873, James Clerk Maxwell, within a Lagrangian description of electric currents, wrote down a ‘general law of electromagnetic induction’ given by, in modern form and with standard symbols:
Bookmarks Related papers MentionsView impact
The definition of the induced emf as the integral over a closed loop of the Lorentz force acting ... more The definition of the induced emf as the integral over a closed loop of the Lorentz force acting on a unit positive charge leads immediately to a general law for electromagnetic induction phenomena. The general law is applied to three significant cases: moving bar, Faraday's and Corbino's disc. This last application illustrates the contribution of the drift velocity of the charges to the induced emf: the magneto-resistance effect is obtained without using microscopic models of electrical conduction. Maxwell wrote down "general equations of electromotive intensity" that, integrated over a closed loop, yield the general law for electromagnetic induction, if the velocity appearing in them is correctly interpreted. The flux of the magnetic field through an arbitrary surface that have the circuit as contour is not the cause of the induced emf. The flux rule must be considered as a calculation shortcut for predicting the value of the induced emf when the circuit is filif...
Bookmarks Related papers MentionsView impact
The analysis of the Doppler effect for photons in rotating systems, studied using the M\"oss... more The analysis of the Doppler effect for photons in rotating systems, studied using the M\"ossbauer effect, confirms the general conclusions of a previous paper dedicated to experiments with photons emitted/absorbed by atoms/nuclei in inertial flight. The wave theory of light is so deeply rooted that it has been--and currently is--applied to describe phenomena in which the fundamental entities at work are discrete (photons). The fact that the wave theory of light can describe one aspect of these phenomena can not overshadow two issues: the corpuscular theory of light, firstly applied to the Doppler effect for photons by Schr\"odinger in 1922, is by far more complete since it describes all the features of the studied phenomena; the wave theory can be used only when the number of photons at work is statistically significant. The disregard of basic methodological criteria may appear as a minor fault. However, the historical development of quantum physics shows that the predomin...
Bookmarks Related papers MentionsView impact
The wave and the photon descriptions of light are discussed in connection with interference and t... more The wave and the photon descriptions of light are discussed in connection with interference and the Doppler effect. Both phenomena can be described in terms of waves or in terms of photons. However, the two descriptions are not equivalent. While the photon description deals with a single photon, the wave one deals with the behaviour of many (enough) photons. The wave description’s predictions are in agreement with experiment only when the high number of photons used (one at a time or all together) overshadows their spatially localised interaction with the detectors. These arguments are dealt with on the basis of historical breakthroughs in the light epistemological considerations and teaching implementations.
Bookmarks Related papers MentionsView impact
Il Nuovo Cimento, 1960
... (]sing the charge transfer model, BASSANI and INCIIAUS I"~ (s) calculated the displa... more ... (]sing the charge transfer model, BASSANI and INCIIAUS I"~ (s) calculated the displacements of the ~ and fi ... 3. - The annealing of the ~ band in a KCI crystal colored withX-rays at 95 °K. ... the potassium salls and that tim x bands occ.ur at considerably lower energies than were ...
Bookmarks Related papers MentionsView impact
Il Nuovo Cimento (1955-1965), 1960
... (]sing the charge transfer model, BASSANI and INCIIAUS I"~ (s) calculated the displa... more ... (]sing the charge transfer model, BASSANI and INCIIAUS I"~ (s) calculated the displacements of the ~ and fi ... 3. - The annealing of the ~ band in a KCI crystal colored withX-rays at 95 °K. ... the potassium salls and that tim x bands occ.ur at considerably lower energies than were ...
Bookmarks Related papers MentionsView impact
EPL (Europhysics Letters), 2008
Bookmarks Related papers MentionsView impact
Solid State Communications
Bookmarks Related papers MentionsView impact
Physical Review B
Bookmarks Related papers MentionsView impact
Le Journal de Physique Colloques
Bookmarks Related papers MentionsView impact
European Journal of Physics, 2016
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Nuovo Cimento B Serie, Mar 1, 2007
Bookmarks Related papers MentionsView impact
Http Dx Doi Org 10 1080 00033799400200311, Aug 23, 2006
The reaction of Italian physicists to the innovations of the ‘new physics’ has been studied by an... more The reaction of Italian physicists to the innovations of the ‘new physics’ has been studied by analysing their scientific production and their textbooks. Their stand appears to have been the result of several components: absence or weakness of lines of research in the last three decades of the nineteenth century (electrical discharge in gases, black body radiation, statistical approach to
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
European Journal of Physics, 2015
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Uploads
Papers by giuseppe giuliani