POINT-CONTACT CONDUCTANCE OF AN OPEN RESONATOR

Coherent resonant tunneling peaks are observed in the conductance of a quantum point contact coupled to an open resonator in a two-dimension al electron gas as we tune the resonator's dimensions. A wavelet based boundary wall method Is used to compute both the electronic wave func tion and probability current in and around the resonator, We find exce llent agreement between the calculated and measured conductance resona nces, and identify fine structure associated with the lemon billiard c avity modes.