Pumped current and voltage for an adiabatic quantum pump

Original · EN

We consider adiabatic pumping of electrons through a quantum dot. There are two ways to operate the pump: to create a dc current I or to create a dc voltage V. We demonstrate that, for very slow pumping, I and V are not simply related via the dc conductance G as I = V G. For the case of a chaotic quantum dot, we consider the statistical distribution of V G - I. Results are presented for the limiting cases of a dot with single channel and with multichannel point contacts.