Coherent Control of Interacting Electrons in Quantum Dots via Navigation in the Energy Spectrum

G. E. MURGIDA; D. A. WISNIACKI; P. I. TAMBORENEA

PHYSICAL REVIEW LETTERS

American Physical Society

Lugar: New York; Año: 2007 vol. 99 p. 368061 - 368064

0031-9007

   Quantum control of the wave function of two interacting electrons confined in quasi-one-dimensionaldouble-well semiconductor structures is demonstrated. The control strategies are based on the knowledgeof the energy spectrum as a function of an external uniform electric field. When two low-lying levels havean avoided crossing, our system behaves dynamically to a large extent as a two-level system. Thischaracteristic is exploited to implement coherent control strategies based on slow (adiabatic passage) andrapid (diabatic Landau-Zener transition) changes of the external field. We apply this method to reachdesired target states that lie far in the spectrum from the initial state.