Finite-size scaling analysis of spin correlations and fluctuations of two quantum dots in a T-shape geometry

Abstract

The study of interacting nanostructures such as quantum dots is a playground for several novel numerical approaches. Recently developed methods such as the time-dependent density matrix renormalization approach or the embedded-cluster approximation rely on the numerical solution of clusters of finite-size. For the interpretation of numerical results, it is important to understand finite-size and boundary effects. Here, we study spin fluctuations and spin–spin correlations of two dots coupled in a T-shape geometry. Depending on odd–even effects, quite different results emerge from clusters that do not differ much in size. r 2007 Elsevier B.V. All rights reserved.