Signatures of dynamical tunneling in semiclassical quantum dots

The transport in large, and strongly open, quantum dots, which might typically be viewed as lying well within the semiclassical regime, was studied. It was found that the low-temperature magnetoresistance of these structures exhibits regular fluctuations, with just a small number of dominant frequency components, indicative of the presence of dynamical tunneling into regular orbits. Results suggest that dynamical tunneling may apply a more generic role in transport through mesoscopic structures than has thus far been appreciated.