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Coupling symmetry of quantum dot states

Rogge, M. C. ; Harke, B. ; Fricke, C. ; Hohls, F. ; Reinwald, Matthias ; Wegscheider, Werner ; Haug, R. J.
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Date of publication of this fulltext: 25 Jan 2010 13:02


Abstract

With noninvasive methods, we investigate ground and excited states of a lateral quantum dot. Charge detection via a quantum point contact is used to map the dot dynamics in a regime where the current through the dot is too low for transport measurements. In this way we investigate and compare the tunneling rates from the dot to source and drain. We find a symmetry line on which the tunneling ...

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