A quantized current source with mesoscopic feedback
arXiv:1105.5501 · doi:10.1103/PhysRevB.83.193306
Abstract
We study a mesoscopic circuit of two quantized current sources, realized by non-adiabatic single- electron pumps connected in series with a small micron-sized island in between. We find that quantum transport through the second pump can be locked onto the quantized current of the first one by a feedback due to charging of the mesoscopic island. This is confirmed by a measurement of the charge variation on the island using a nearby charge detector. Finally, the charge feedback signal clearly evidences loading into excited states of the dynamic quantum dot during single-electron pump operation.
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- A hybrid metal/semiconductor electron pump for quantum metrology
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- An error accounting algorithm for electron counting experiments
- A random-walk benchmark for single-electron circuits
- Non-adiabatic single-electron pump in a dopant-free GaAs/AlGaAs 2DEG
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- Controlling the error mechanism in a tunable-barrier non-adiabatic charge pump by dynamic gate compensation