Prof Ferdinand Kuemmeth from Copenhagen University will visit UCLQ and give a talk about spin exchange in quantum dot arrays.

TITLE: Spin exchange in quantum dot arrays

ABSTRACT: Modern computers process information classically, using the charge of large ensembles of electrons. Quantum effects remain a detail rather than a resource. Quantum computers based on individual spins in the solid-state environment will require a detailed understanding and appropriate use of coherent spin interactions, with the Heisenberg exchange interaction likely playing a central role. Using an array of quantum dots in a GaAs heterostructure, defined and controlled by top gates, we explore the properties of a multielectron dot for inducing coherent spin exchange processes between neighboring and non-nearest-neighbor one-electron dots.