Quantized Charge Pumping through a Carbon Nanotube Double Quantum Dot

Abstract

We demonstrate single-electron pumping in a gate-defined carbon nanotube double quantum dot. By periodic modulation of the potentials of the two quantum dots we move the system around charge triple points and transport exactly one electron or hole per cycle. We investigate the pumping as a function of the modulation frequency and amplitude and observe good current quantization up to frequencies of 18 MHz where rectification effects cause the mechanism to break down.

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• Geometrical Formulation of Adiabatic Pumping as a Heat Engine
• Topological pumping in class-D superconducting wires
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• Geometric Fluctuation Theorem
• Quantum thermodynamics of nanoscale thermoelectrics and electronic devices
• Non-adiabatic effect in quantum pumping for a spin-boson system
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• Role of coherence in quantum-dot-based nanomachines within the Coulomb blockade regime
• Optimal control over the full counting statistics in a non-adiabatic pump