title: Theory of anisotropic exchange in laterally coupled quantum dots.
abstract: The effects of spin-orbit coupling on the two-electron spectra in lateral coupled quantum dots are investigated analytically and numerically. It is demonstrated that in the absence of magnetic field, the exchange interaction is practically unaffected by spin-orbit coupling, for any interdot coupling, boosting prospects for spin-based quantum computing. The anisotropic exchange appears at finite magnetic fields. A numerically accurate effective spin Hamiltonian for modeling spin-orbit-induced two-electron spin dynamics in the presence of magnetic field is proposed.
authors.affiliation: Institute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany.
authors.forename: Fabio
authors.initials: F
authors.lastname: Baruffa
authors.forename: Peter
authors.initials: P
authors.lastname: Stano
authors.forename: Jaroslav
authors.initials: J
authors.lastname: Fabian