A transformation of the electron states-say those enclosed in a potential box-into the de Broglie waves done in the paper, enabled us to calculate the energy change between two quantum levels as a function of the specific heat and difference of the temperature between the states. In consequence, the energy difference and that of entropy between the levels could be examined in terms of the appropriate classical parameters. In the next step, the time interval necessary for the electron transition between the levels could be associated with the classical electrodynamical parameters like the electric resistance and capacitance connected with the temporary formation of the electric cell in course of the transition. The parameters characterizing the mechanical inertia of the electron were next used as a check of the electrodynamical formulae referring to transition. Journal of Modern Physics the electron transitions, and their properties, approximately on the level presented by Einstein. A step forwards was here the wave functions of the stationary states applied in calculating the transition probabilities between different quantum levels.Another feature of the probabilistic Einstein theory was the assumption that a large, though rather undefined, number of the quantum objects should enter a given transition. This difficulty seems to be not involved in the Planck's approach where the number of the states which participate in transition can be definited and not necessarily large. This property allows us to consider also transitions in which the number of participating objects is relatively small. Moreover, when the Joule-Lenz classical approach [3] is applied on the quantum footing [4], the intensity of the energy emission can be estimated for a transition of a single particle without any reference to the probabilistic theory.In effect, the aim of the present paper became to examine a single electron transition in small quantum systems on both probabilistic and non-probabilisticfooting. An analysis of the classical physical parameters of mechanics, thermodynamics and electrodynamics which can be connected with the transition seems to be then of use.
Notion of Temperature Applied for a Small Number of Quantum SystemsHistorically the quantum theory began as a statistics of photons emitted in course of the black-body radiation. Here the notion of temperature does accompany systematically the presentation of the energy distribution among the quantum levels. Somewhat later a concurrent quantum theory by Schrödinger banned essentially the notion of temperature and that of particle oscillations from the basic idea of the quantum states: the spectrum of levels has been replaced by a set of discrete entities being in general essentially different in their individualproperties. The temperature is then assumed to be close to zero.Nevertheless, for less or more numerous ensembles of particles, a reference between the temperature and energy remained of importance. The point became especially sound for the case of very low temperatur...