Tunable Nonlocal Spin Control in a Coupled-Quantum Dot System

• DOI: 10.1126/science.1095452
• Publication Date: 2004-03-30T01:15:10Z
• Authors: N. J. Craig; J. M. Taylor; E. A. Lester; C. M. Marcus; M. P. Hanson; A. C. Gossard
• Keywords: Magnetic impurity; Anderson impurity model

The effective interaction between magnetic impurities in metals that can lead to various ground states often competes with a tendency for electrons near screen the local moment (Kondo effect). simplest system exhibiting richness of this competition, two-impurity Kondo system, is here realized experimentally form two quantum dots coupled through an open conducting region. We demonstrate non-local spin control by suppressing and splitting resonances one dot changing electron number coupling other dot. Results suggest approach relevant information processing.