Classical fields on the null-plane

Nenhuma Miniatura disponível



Título da Revista

ISSN da Revista

Título de Volume



The description of the dynamics of the physical systems requires the specification of the evolution of the quantities that determine them in passing from one three-dimensional surface to the other, each one of them defined by the constant value of a parameter called «time». But such surfaces and such time can be chosen in different manners, as it was shown by Dirac in 1949; the inequivalent possible choices are called «dynamical forms». In this study we precisely define them, focusing in particular in the so-called «light-front dynamics» or «null-plane dynamics», in which the time is a coordinate defined on the light-cone. We study the classical free fields in this formulation: the scalar, fermion, electromagnetic and massive vector ones, establishing the solution to their initial-value problem (Goursat's problem), the classification of their components as dynamical and non-dynamical, and their polarization states. We finalize by highlighting the advantages and disadvantages of null-plane physics, hoping to provide a relevant initiation material to this promising, although generally unknown, area of physics



Classical field theory, dinâmica da frente de luz, dinâmica do plano nulo, light-front dynamics, null-plane dynamics, Teoria clássica de campos

Como citar

Revista Brasileira de Ensino de Fisica, v. 43, p. 1-29.