Regensburg 2004 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 13: Hauptvortrag Bayer

HL 13.1: Hauptvortrag

Dienstag, 9. März 2004, 09:30–10:15, H15

Quantum dots: Building blocks of quantum devices? — •M. Bayer — Universität Dortmund, Experimentelle Physik II, Otto-Hahn Str.4, 44227 Dortmund

Quantum dots have attracted considerable attention recently for their potential to implement modern fields of physics such as quantum optics or quantum information processing in a solid state environment. While quite some progress has been made to manifest this potential, still a lot of open questions remain. In this contribution we will try to present some of these dot applications and discuss related problems and strategies how to overcome them. In quantum optics, for example, single dots might be used as light sources for single photons or entangled photons. For these purposes a high degree of control of the light-matter interaction is required, which can be obtained by placing the dots in a resonator. The current status of these activities will be considered. For quantum information applications quantum bits with controllable interactions between them are needed, in order to realize gates. Such gates might be obtained by coupling of dots. Results of studies on demonstration of coherent coupling, on control of coupling and on decoherence of excitons will be presented.