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Phys Rev Lett. 2004 Oct 29;93(18):186802. Epub 2004 Oct 27.

Manipulation of a single charge in a double quantum dot.

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  • 1Department of Physics, Harvard University, Cambridge, MA 02138, USA.


We manipulate a single electron in a fully tunable double quantum dot using microwave excitation. Under resonant conditions, microwaves drive transitions between the (1,0) and (0,1) charge states of the double dot. Local quantum point contact charge detectors enable a direct measurement of the photon-induced change in occupancy of the charge states. From charge sensing measurements, we find T1 approximately 16 ns and a lower bound estimate for T*(2) of 400 ps for the charge two-level system.

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