Resonant Transfer of Excitons and Quantum Computation

Brendon Lovett, John H. Reina, Ahsan Nazir, Beeneet Kothari, Andrew Briggs

Published 2002-09-11, updated 2003-01-06Version 2

Resonant energy transfer mechanisms have been observed in the sensitized luminescence of solids, in quantum dots and in molecular nanostructures, and they also play a central role in light harvesting processes in photosynthetic organisms. We demonstrate that such mechanisms, together with the exciton-exciton binding energy shift typical of these nanostructures, can be used to perform universal quantum logic. In particular, we show how to generate controlled exciton entanglement and identify two different regimes of quantum behaviour.