Theory of anisotropic exchange in laterally coupled quantum dots.
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.
Baruffa
Fabio
F
Institute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany.
Stano
Peter
P
Fabian
Jaroslav
J