Berlin 2008 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 30: Quantum dots and wires: Transport properties II
HL 30.13: Vortrag
Dienstag, 26. Februar 2008, 17:30–17:45, ER 164
Spin properties of two electron lateral coupled quantum dots — •Fabio Baruffa1, Peter Stano2, and Jaroslav Fabian1 — 1Institute of Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany — 2Research center for quantum information, Slovak Academy of sciences, Bratislava, Slovakia
We report our numerical calculations of the exchange coupling in single and double quantum dots defined in GaAs heterostructures. In particular we examine the dependence of the exchange on the magnetic field. We use the exact diagonalization technique based on the finite-difference method, to solve for single-electron states, as well as the configuration interaction expansion to treat the two-electron system. Our results are of practical importance for quantum dot electron spin based quantum information processing. The work is supported by GRK 638 and SPP 1285.