We studied the fundamental question of dynamical tunneling in generic 2D Hamilton systems by considering regular-to-chaotic tunneling rates. Experimentally, we use microwave spectra of a mushroom billiard with adjustable foot. Numerically, we obtain tunneling rates from high precision eigenvalues using a new method. Analytically, a prediction is given by extending an approach using a fictitious integrable system to billiards. We find agreement with experimental and numerical data without any free parameter.
COBISS.SI-ID: 62112001