Fractal conductance fluctuations in a quantum-dot molecule

Exactly self-similar, and statistically self-similar, features have been studied in the magneto-conductance of an open quantum-dot molecule. The fractal dimensions determined from the two different features are found to differ significantly from each other. While we do not understand the detailed origins of this difference at present, our results suggest that different physical processes are responsible for the two different types of fractal structure.