  in nanoscale systems in the presence of single-electron excitations generated
by Lorentzian voltage drives, termed \textit{Levitons}. These excitations allow
to realize the analog of quantum optics experiments using electrons instead of
photons. Importantly, electrons in condensed matter systems are strongly
affected by the presence of different types of non-trivial correlations, with
no counterpart in the domain of photonic quantum optics. After providing a
short introduction about Levitons in non-interacting systems, we focus on how
they operate in the presence of two types of strong electronic correlations in
nanoscale systems, such as those arising in the fractional quantum Hall effect
or in superconducting systems. Specifically, we consider Levitons in a quantum
Hall bar of the fractional quantum Hall effect, pinched by a quantum point
contact, where anyons with fractional charge and statistics tunnel between
opposite edges. In this case, a Leviton-Leviton interaction can be induced by
the strongly correlated background. Concerning the effect of superconducting
correlations on Levitons, we show that, in a normal metal system coupled to BCS
superconductors, half integer Levitons minimize the excess noise in the Andreev
regime. Interestingly, energy-entangled electron states can be realized
on-demand in this type of hybrid setups by exploiting crossed Andreev
reflection. The results exposed in this review have potential applications in
the context of quantum information and computation with single-electron flying
qubits.
