Single-electron counting statistics with a finite frequency bandwidth

Single-electron counting is widely used to probe single electron dynamics and correlated electron transport through quantum dots. However, finite frequency bandwidth in amplifying and analyzing the detector current removes fast counting events and alters the statistics. We have developed a correction scheme to obtain the actual tunneling rates through a quantum dot, when the detector has a low pass filter with a cutoff frequency comparable to the rates. The accuracy of our scheme is confirmed by simulating the filtering effect on Poisson random switching events and by applying it to experimental data for self-checking. (C) 2014 The Japan Society of Applied Physics