Multipolar representation of Maxwell and Schroedinger equations: Lagrangian and Hamiltonian formalisms: Examples

摘要

Behavior of a single mesoscopic cell (device) we may usually describe by equations of quantum mechanics. However, if experimentators gather hundreds of thousands of similar cells there arises some artificial medium that one already needs to describe by means of new electromagnetic equations. The same problem arises when we try to describe, for example, a sublattice structure of such complex substances like perovskites. It is demonstrated that the inherent primacy of vector potential in quantum systems leads to a generalization of the equations of electromagnetism by introducing in them toroid polarizations. To derive the equations of motion, the Lagrangian and the Hamiltonian formalisms are used. Some examples where electromagnetic properties of molecules are described by the toroid moment are pointed out. (author). 26 refs, 7 figs. (Atomindex citation 28:038445)