title: Spin-Orbit Coupling at the Level of a Single Electron.
abstract: We utilize electron counting techniques to distinguish a spin-conserving fast tunneling process and a slower process involving spin flips in AlGaAs/GaAs-based double quantum dots. By studying the dependence of the rates on the interdot tunnel coupling of the two dots, we find that as many as 4% of the tunneling events occur with a spin flip related to spin-orbit coupling in GaAs. Our measurement has a fidelity of 99% in terms of resolving whether a tunneling event occurred with a spin flip or not.
authors.affiliation: Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: V F
authors.initials: VF
authors.lastname: Maisi
authors.affiliation: Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: A
authors.initials: A
authors.lastname: Hofmann
authors.affiliation: Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Röösli
authors.affiliation: Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: J
authors.initials: J
authors.lastname: Basset
authors.affiliation: Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: C
authors.initials: C
authors.lastname: Reichl
authors.affiliation: Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: W
authors.initials: W
authors.lastname: Wegscheider
authors.affiliation: Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: T
authors.initials: T
authors.lastname: Ihn
authors.affiliation: Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: K
authors.initials: K
authors.lastname: Ensslin