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Science 5 July 2002:
Vol. 297. no. 5578, pp. 70 - 72
DOI: 10.1126/science.1071215
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Reports

Probing and Controlling the Bonds of an Artificial Molecule

Alexander W. Holleitner,1* Robert H. Blick,1 Andreas K. Hüttel,1 Karl Eberl,2 Jörg P. Kotthaus1

We demonstrate how molecular quantum states of coupled semiconductor quantum dots are coherently probed and manipulated in transport experiments. The applied method probes quantum states by the virtual cotunneling of two electrons and hence resolves the sequences of molecular states simultaneously. This result is achieved by weakly probing the quantum system through parallel contacts to its constituting quantum dots. The overlap of the dots' wave functions and, in turn, the splitting of molecular states are adjusted by the direct influence of coupling electrodes.

1 Center for NanoScience and Sektion Physik, Ludwig-Maximilians-Universität, Geschwister-Scholl-Platz 1, 80539 München, Germany.
2 Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany.
*   To whom correspondence should be addressed. E-mail: Alex.Holleitner{at}physik.uni-muenchen.de

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Single-Electron Delocalization in Hybrid Vertical-Lateral Double Quantum Dots.
T. Hatano, M. Stopa, and S. Tarucha (2005)
Science 309, 268-271
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