Interference effects in potential wells

Quantum beats and polarization interference from excitons in quantum wells

We show that time-resolved quantum beat spectroscopy in the four-wave rnixing (FWM) geometry is a unique tool to investigate the electronic multi-level system associated with spectrally adjacent excitonic resonances. We have studied heavyand light-hole excitons, excitons associated with different and spatially separated quantum wells, and excitons associated with spatially separated growth isla...

Tunneling Ionization Rates from Arbitrary Potential Wells

We present a practical numerical technique for calculating tunneling ionization rates from arbitrary 1-D potential wells in the presence of a linear external potential by determining the widths of the resonances in the spectral density, ρ(E), adiabatically connected to the field-free bound states. While this technique applies to more general external potentials, we focus on the ionization of el...

Event-related potential correlates of interference effects on recognition memory.

The question of interference (how new learning affects previously acquired knowledge and vice versa) is a central theoretical issue in episodic memory research, but very few human neuroimaging studies have addressed this question. Here, we used event-related potentials (ERPs) to test the predictions of the complementary learning systems (CLS) model regarding how list strength manipulations (str...

Coherent excitonic effects in quantum wells

Tunneling Effects between Tori in Double Wells

We consider tunneling between 2 symmetric potential wells for a 2-d Schrodinger operator, in the case of eigenvalues associated with with quasi=modes supported on KAM or Birkhoff tori. 0. Introduction. We consider here tunneling between 2 symmetric potential wells for a 2-d Schrödinger operator P = −h2∆ + V in the limit h → 0, near some energy level E0 = 0 close to the non degenerate minima of ...