Mach-Zehnder interferometry with periodic voltage pulses

We investigate theoretically a Mach-Zehnder interferometer driven by periodic voltage pulses. We illustrate how the electronic energy distribution of the driven contact influences the visibilities of the Aharonov-Bohm oscillations in the current and in the noise. For the current, the visibility factorizes in analogy to the static case and we find a universality at path-length differences equal to multiples of the spacing between the voltage pulses. In the noise oscillations, we find additional features which are characteristic to time-dependent transport. Finite electronic temperatures are found to have a qualitatively different influence on the current and the noise.