Time-Resolved Detection of Individual Electrons in a Quantum Dot

Details Time-Resolved Detection of Individual Electrons in a Quantum Dot Time-Resolved Detection of Individual Electrons in a Quantum Dot

2004-06-23

arxiv.org/abs/cond-mat/0406568v2

Appl. Phys. Lett. 85, 2005 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 3 figures

Scientific paper

10.1063/1.1784875

We present measurements on a quantum dot and a nearby, capacitively coupled, quantum point contact used as a charge detector. With the dot being weakly coupled to only a single reservoir, the transfer of individual electrons onto and off the dot can be observed in real time in the current signal from the quantum point contact. From these time-dependent traces, the quantum mechanical coupling between dot and reservoir can be extracted quantitatively. A similar analysis allows the determination of the occupation probability of the dot states.

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