On the theory of cavities with point-like perturbations. Part II: Rectangular cavities

TL;DR

This paper applies a general theory of point-like perturbations to rectangular cavities, analyzing experimental wave patterns and explaining phenomena like broken nodal lines observed in nearly degenerate states.

Contribution

It extends the theory of cavities with point-like perturbations specifically to rectangular shapes and explains experimental observations of wave patterns.

Findings

Broken nodal lines observed in experiments

Theoretical explanation of experimental wave patterns

Application of general theory to rectangular cavities

Abstract

We consider an application of a general theory for cavities with point-like perturbations for a rectangular shape. Hereby we concentrate on experimental wave patterns obtained for nearly degenerate states. The nodal lines in these patterns may be broken, which is an effect coming only from the experimental determination of the patterns. These findings are explained within a framework of the developed theory.