ausblenden:
Schlagwörter:
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Zusammenfassung:
We report on electron transport through an artificial molecule
formed by two tunnel coupled quantum dots, which are laterally
confined in a two-dimensional electron system of an AlxGa1-
xAs/GaAs heterostructure. Coherent molecular states in the
coupled dots are probed by photon-assisted tunneling (PAT).
Above 10 GHz, we observe clear PAT as a result of the resonance
between the microwave photons and the molecular states. Below 8
GHz, a pronounced superposition of phonon- and photon-assisted
tunneling is observed. Coherent superposition of molecular
states persists under excitation of acoustic phonons.
