Quantum Electromagnetic fields in the neighbourhood of an atom

Massimo Auci, GUIDO DEMATTEIS

The foundations of quantum mechanics (QM) can find a consistent and exhaustive explanation in a new theoretical context. The "Approach" allows us to justify both classical and quantum electromagnetic phenomenology by using classical concepts. In this paper we review the bases of the attempt originating form the role that the transverse component of the Poynting vector plays in localising energy in the neighbourhood of an electromagnetic source and we analyse the quantum implications.

Iwo Białynicki‐Birula, Zofia Białynicka-Birula

Helen S. Freedhoff, Martin E. Smithers

Preliminary studies have been made of a system which consists of a molecule placed in an intense electromagnetic field resonant with a molecular transition frequency, and a probe field containing frequencies in the neighbourhood of the resulting dynamic Stark splitting frequency 2 epsilon . In these studies, only a single decay process was considered. Both emission and absorption of radiation by the system are predicted at frequencies near 2 epsilon , provided that the molecule has different permanent dipole moments in its lower and its upper states. A correct treatment, which allows for a cascade of emitted photons, is expected to bring about some quantitative changes in the shape of the predicted spectrum, but to leave unchanged the basic prediction of transitions at frequency 2 epsilon .

Eliade N. Stefanescu

Jan Peřina

Frank Arntzenius

In this chapter it is argued that one cannot specify the state of the contents of a classical world, i.e. the state of matter and fields which is governed by classical physics, space-time point by space-time point, i.e. that classical worlds are not separable. But, it is argued, one can give such a state neighbourhood by neighbourhood, where these neighbourhoods can be as small as one likes. Moreover, it is argued, one can also give the geometric structure of classical space-times neighbourhood by neighbourhood. The upshot is that the structure of the content of classical worlds is less local than traditionally thought, while the geometrical structure of classical worlds is more local than traditionally thought.