The electromagnetic field as a local property of a quantum system

M. Gorayeb, José Luis Paz, A. J. Hernández

It was studied the solvent influence over a two level system interacting with an electromagnetic field using an stochastic treatment. It was considered a high-intensity electromagnetic field which is capable to produce local saturations. The induced coherence in the two electronic states, was averaged in the usual form, through both, Lorentzian and Gaussian probability density. From that, analytical expressions for susceptibility and optical properties were obtained. Numerical calculations were carried out to construct surfaces corresponding to this properties as a function of the field variables and the distributions parameters.

Jesús Plata, Jose M. Gomez Llorente

The effect of a monochromatic electromagnetic field in the localization properties and tunneling rates of a two-level system is studied within a purely quantum framework. This generalizes a recent semiclassical analysis and provides analytical expressions which are valid for an arbitrary number of photons in the field. Some consequences and applications of the possibility of tunneling control in an electromagnetic cavity are discussed.

Jan Peřina

Márton Gömöri, László E. Szabó

The special relativity principle presupposes that the states of the physical system concerned can be meaningfully characterized, at least locally, as such in which the system is at rest or in motion with some velocity relative to an arbitrary frame of reference. In the first part of the paper we show that electrodynamic systems, in general, do not satisfy this condition. In the second part of the paper we argue that exatly the same condition serves as a necessary condition for the persistence of an extended physical object. As a consequence, we argue, electromagnetic field strengths cannot be the individuating properties of electromagnetic field---contrary to the standard realistic interpretation of CED. In other words, CED is ontologically incomplete.