Full counting statistics of a nonadiabatic electron pump

Nonadiabatic charge pumping through a single-level quantum dot with periodically modulated parameters is studied theoretically. By means of a quantum-master-equation approach the full counting statistics of the system is obtained. We find a trinomial-probability distribution of the charge transfer, which adequately describes the reversal of the pumping current by sweeping the driving frequency. Further, we derive equations of motion for current and noise and solve those numerically for two different driving schemes. Both show interesting features, which can be fully analyzed due to the simple and generic model studied