Modeling of a tunable-barrier non-adiabatic electron pump beyond the decay cascade model

Abstract

We generalize the decay cascade model of charge capture statistics for a tunable-barrier non-adiabatic electron pump dominated by the backtunneling error at the quantum dot decoupling stage. The energy scales controlling the competition between the thermal and the dynamical mechanisms for accurate trapped charge quantization are discussed. Empirical fitting formula incorporating quantum dot re-population errors due to particle-hole fluctuations in the source lead is suggested and tested against an exactly solvable rate equation model.

2-page summary paper for CPEM Digest'2014

References in corpus (4)

• Towards a quantum representation of the ampere using single electron pumps
• Single-parameter non-adiabatic quantized charge pumping
• Counting statistics for electron capture in a dynamic quantum dot
• Quantum fluctuations and coherence in high-precision single-electron capture

Cited by in corpus (6)

• Validation of a quantized-current source with 0.2 ppm uncertainty
• Evidence for universality of tunable-barrier electron pumps
• Thermal-error regime in high-accuracy gigahertz single-electron pumping
• Robust operation of a GaAs tunable barrier electron pump
• High-resolution error detection in the capture process of a single-electron pump
• Controlling the error mechanism in a tunable-barrier non-adiabatic charge pump by dynamic gate compensation