期刊
NANOTECHNOLOGY
卷 21, 期 27, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/21/27/274003
关键词
-
资金
- Swiss National Foundation (SNF)
Quantum point contacts are in use as an on-chip capacitative readout for the charge state of quantum dot systems. Here we investigate experimentally the back-action of quantum point contacts (QPCs) on a nearby double quantum dot (DQD). Driving current through a QPC influences the DQD state and leads to a measurable current flow in the DQD circuit with no bias voltage applied. The responsible mechanism is an indirect back-action process due to ohmic heating of the phonon bath. The system behaves like a thermoelectric engine, where a temperature gradient between the phonon bath and the electronic bath generates work observable as a measurable current flowing through the DQD.
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