Bound states and resonances in waveguides and quantum wires

We present experimental and theoretical results on bound states in quantum wires (narrow, two-dimensional quantum channels). We study rectangular systems of constant width, varying the bend angle. This system is realized by propagation of TE-mode microwaves in flat rectangular waveguides; resonant frequencies for absorption of power are measured for various bend angles, and compared with theoretical results for bound-state (resonant) eigenvalues.