Quantum control of electrons in semiconductor nanostructures using spatially uniform electric fields

• Published in: 40th IEEE Conference on Decision and Control 2001 Vol. 1; pp. 281 - 286 vol.1
• Main Authors: Tamborenea, P.I., Metiu, H.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2001
• Subjects: Control systems; Free electron lasers; Laser excitation; Laser modes; Optical pulses; Quantum dot lasers; Quantum well lasers; Semiconductor nanostructures; Voltage; Wave functions
• ISBN: 9780780370616; 0780370619
• DOI: 10.1109/CDC.2001.980113

We have studied quantum control operations on electrons confined in semiconductor nanostructures using time-dependent spatially uniform electric fields. Our general goal was to manipulate the wave function of one or two electrons and thereby control a certain quantum probability of interest. Since our main interest was in performing certain tasks rather than in developing efficient control methods, we searched relevant parts of our parameter space numerically in a systematic manner. Here we summarize the results of three studies whose common denominator is the fact that the control of the wave function is performed using a uniform electric field, or, in other words, through the electric dipole approximation Hamiltonian H/sub d/= -er/spl middot/E(t). The subjects of these studies are: Coherent control of multisubband wavepackets with terahertz pulses, single-electron turnstile modelled with two interacting electrons, and dynamical localization of two interacting electrons in coupled quantum dots.