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Berlin 2005 – scientific programme

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TT: Tiefe Temperaturen

TT 8: Posters Transport

TT 8.51: Poster

Friday, March 4, 2005, 14:00–18:00, Poster TU C

Noise-assisted tunneling in a quantum dot: high-frequency shot noise measurement of a quantum point contact — •Udo Hartmann2, Franck Balestro1, Eugen Onac1, Laurens W. van Beveren1, Ronald Hanson1, Yuli V. Nazarov1, and Leo P. Kouwenhoven11Kavli Institute of Nanoscience Delft and ERATO Mesoscopic Correlation Project, Delft University of Technology, PO Box 5046, 2600 GA Delft, The Netherlands — 2Physics Department and CeNS, Ludwig-Maximilians-Universität München, Theresienstr. 37, 80333 München, Germany

We measured tunneling through a quantum dot (QD) induced by shot noise of a quantum point contact (QPC). The influence of the bias voltage through the QPC and the transmission of it have been explored.

We provide a theoretical model based on the description of photon-assisted tunneling (PAT). In contrast to PAT, we do not describe the environment of the QD as a continuous wave source (e.g. a microwave) of irradiation. Instead, we apply a temperature-dependent P(E) theory to calculate tunneling rates through the QD.

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