Controlling Artificial Atoms

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Science  20 Nov 1998:
Vol. 282, Issue 5393, pp. 1429-1430
DOI: 10.1126/science.282.5393.1429

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Quantum dots are semiconductor structures with an interesting property: Although they consist of many atoms, they can behave just like a single atom. In their Perspective, Julien and Alexandrou discuss results presented in the same issue by Bonadeo et al. in which the quantum state of a quantum dot has been coherently controlled. In addition to applications in optoelectronics as low-threshold semiconductors, these dots might be useful as logic elements in a quantum computer.