  We propose a source capable of on-demand emission of single electrons with a
wave packet of controllable shape and phase. The source consists of a hybrid
quantum system, relying on currently experimentally accessible components. We
analyze in detail the emission of single electron time-bin qubits, which we
characterize using the well known electronic Hong-Ou-Mandel (HOM)
interferometry scheme. Specifically, we show that, by controlling the phase
difference of two time-bin qubits, the Pauli peak, the electronic analogue of
the well known optical HOM dip, can be continuously removed. The proposed
source constitutes a promising approach for scalable solid-state architectures
for quantum operations using electrons and possibly for an interface for photon
to electron time-bin qubit conversion.
