Khrapai, V. S. and Ludwig, S. and Kotthaus, Jörg P. and Tranitz, Hans-Peter and Wegscheider, Werner
Double-Dot Quantum Ratchet Driven by an Independently Biased Quantum Point Contact.
Physical Review Letters 97 (17), p. 176803.
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We study a double quantum dot (DQD) coupled to a strongly biased quantum point contact (QPC), each embedded in independent electric circuits. For weak interdot tunneling we observe a finite current flowing through the Coulomb blockaded DQD in response to a strong bias on the QPC. The direction of the current through the DQD is determined by the relative detuning of the energy levels of the two ...
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