Design and control of spin gates in two quantum dots arrays

GONZALO USAJ; CARLOS BALSEIRO,

APPLIED PHYSICS LETTERS

Año: 2006 vol. 88 p. 103103 - 103103

0003-6951

We study the spin-spin interaction between quantum dots coupled through a two-dimensional electron gas with spin-orbit interaction. We show that the interplay between transverse electron focusing and spin-orbit coupling allows to dynamically change the symmetry of the effective spin-spin Hamiltonian. That is, the interaction can be changed from Ising-like to Heisenberg-like and vice versa. The sign and magnitude of the coupling constant can also be tuned