line with attached segment as a model of helmholtz resonator: resonant states completeness
;I.Y. Popov;A.I. Popov
cenraps journal of social sciences2017Vol. 29pp. 133-136
157
popov2017journalline
Abstract
Quantum graph consisting of a line with attached segment is considered as a simple model of the Helmholtz resonator. Completeness of resonant states in the space of square integrable functions on the segment is proved. Relation between the completeness and the factorization of the characteristic function in Sz.-Nagy model is discussed.