Transport through a quantum dot analyzed by electron counting

Abstract

We present measurements of single electron tunneling through a quantum dot (QD) using a quantum point contact as charge detector. The counting statistics for varying symmetry of the QD system is examined from a very large statistical basis. We extract high order cumulants describing the distribution and observe prominent oscillations when varying the symmetry. We compare this behavior to the observed oscillation in time dependence and show that the variation in both system variables lead to the same kind of oscillating response. © 2011 American Institute of Physics.