Regensburg 2007 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 7: Quantum Coherence and Quantum Information Systems II

TT 7.7: Vortrag

Montag, 26. März 2007, 15:30–15:45, H20

Spin Dynamics and Hyperfine Interaction in Quantum Dots — •Daniel Klauser, William Anthony Coish, and Daniel Loss — Departement of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

The idea of using the spin of electrons confined to quantum dots for quantum information processing [1], has triggered research to understand the effect of hyperfine interaction on the evolution of electron spins in (double) quantum dots. The hyperfine interaction between the electron spin and the surrounding nuclear spins leads to decoherence of the electron spin state, but also allows to gain information on the nuclear spins through measurement of the electron spin evolution [2]. We discuss recent experimental and theoretical progress in controlling electron spin dynamics under hyperfine interaction.

[1] D. Loss and D. P. DiVincenzo, Phys. Rev. A 57, 120 (1998).

[2] D. Klauser, W. A. Coish, D. Loss, Phys. Rev. B 73, 205302 (2006).