  The recent development of dynamic single-electron sources makes it possible
to observe and manipulate the quantum properties of individual charge carriers
in mesoscopic circuits. Here, we investigate multi-particle effects in an
electronic Mach-Zehnder interferometer driven by dynamic voltage pulses. To
this end, we employ a Floquet scattering formalism to evaluate the interference
current and the visibility in the outputs of the interferometer. An injected
multi-particle state can be described by its first-order correlation function,
which we decompose into a sum of elementary correlation functions that each
represent a single particle. Each particle in the pulse contributes
independently to the interference current, while the visibility (determined by
the maximal interference current) exhibits a Fraunhofer-like diffraction
pattern caused by the multi-particle interference between different particles
in the pulse. For a sequence of multi-particle pulses, the visibility resembles
the diffraction pattern from a grid, with the role of the grid and the spacing
between the slits being played by the pulses and the time delay between them.
Our findings may be observed in future experiments by injecting multi-particle
pulses into an electronic Mach-Zehnder interferometer.
