ORIGIN OF STRONG SCARRING OF WAVE-FUNCTIONS IN QUANTUM-WELLS IN A TILTED MAGNETIC-FIELD

The anomalously strong scarring of the electronic wave functions of qu antum wells in a tilted magnetic field is shown to be due to special p roperties of the classical dynamics of this system. A certain subset o f periodic orbits is identified which is nearly stable over a very lar ge interval of variation of the system parameters; hence this subset e xhibits strong scarring. Semiclassical arguments shed further light on why these orbits dominate the experimentally observed tunneling spect ra.