Double-Dot Quantum Ratchet Driven by an Independently Biased Quantum Point Contact
Double-Dot Quantum Ratchet Driven by an Independently Biased Quantum Point Contact
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 tunnelling we observe a finite current flowing through the unbiased Coulomb blockaded DQD in response to a strong bias on the QPC. The direction of …