Coherent control of tunneling in a quantum dot molecule

By J. Villas-Bôas, A. Govorov, S. Ulloa. 2004

213 citations recorded by the source corpus.

Quantum dot ~QD! structures provide a three-dimensional confinement of carriers. Electrons and holes in the QD can occupy only a set of states with discrete energies, just as in an atom, and can thus be used to perform ‘‘atomic physics’’ experiments in solid-state structures. One advantage of QD’s is that they provide different energy scales and physical features which can be easily varied over a wide range of values. Most important, perhaps, is that QD’s also allow the control of direct quantum-mechanical electronic coupling with not only composition but externally applied voltages. These flexible systems represent therefore the ideal for theoretical and experimental investigations, where the interactions between light and matter can be studied in a fully controlled, wellcharacterized environment, and with excellent optical and electrical probes. These features make semiconductor QD’s promising candidates for applications in electro-optical devices such as QD lasers, 1,2 and in quantum information processing. 3‐ 6 In the latter case, one can exploit the optical excitation in a QD, 3,5 or its spin state, 4,6 as qubits. These high

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/12a6d65054cf1198340869fb4832f5db27bdc228