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Time-Resolved Detection of Individual Electrons in a Quantum Dot

R. Schleser·E. Ruh·T. Ihn·K. Ensslin·D. C. Driscoll·A. C. Gossard
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Abstract

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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R. Schleser, E. Ruh, T. Ihn, K. Ensslin, D. C. Driscoll, A. C. Gossard. 2004-06-24. Time-Resolved Detection of Individual Electrons in a Quantum Dot. https://doi.org/10.1063/1.1784875

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