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Q: Fachverband Quantenoptik und Photonik
Q 41: Quanteninformation (Konzepte und Methoden III)
Q 41.7: Vortrag
Donnerstag, 13. März 2008, 15:30–15:45, 1B
Decoherence protection for nuclear spin quantum memory in a quantum dot — •Zoltan Kurucz1, Martin Sørensen2, and Michael Fleischhauer1 — 1Fachbereich Physik, TU Kaiserslautern — 2Nils-Bohr Institute, Kopenhagen
We reconsider the possibility of storing quantum information in an ensemble of nuclear spins constituting a semiconductor quantum dot [1]. The nuclear magnetic moments are collectively interacting with an excess electron of the quantum dot through inhomogeneous hyperfine coupling. We present a configuration in which the collective nuclear spin states used as the qubit basis are energetically separated from the remaining states, thus protecting the quantum memory from various sources of decoherence.
[1] J. Taylor, C. Marcus, M. Lukin, Phys. Rev. Lett. 90, 206803 (2003)