Abstract
The optically induced indirect exchange interaction between spins in two quantum dots is investigated theoretically. We give a microscopic formulation of the interaction between the localized spin and the itinerant carriers, which is the basis of the indirect coupling, including the effects of correlation using a set of canonical transformations. Correlation effects are found to be of comparable magnitude to the direct exchange. We give quantitative results for the indirect spin-spin coupling for realistic quantum dot geometries and find the largest couplings for one-dimensional systems.
- Received 3 December 2004
DOI:https://doi.org/10.1103/PhysRevB.71.121305
©2005 American Physical Society