  Single photons from solid-state quantum emitters are playing a crucial role
in the development of photonic quantum technologies. Higher order states, such
as N-photon Fock-states allow for applications e.g. in quantum-enhanced
sensing. In this study, we utilize the dispersion of a hot cesium vapor at the
D1 lines to realize a temporal delay for one and two-photon Fock-states as a
result of the slow-light effect. Single photons are generated on-demand from an
InGaAs quantum dot, while their quantum interference at a beam splitter is used
to generate a two-photon Fockstate. We verify the successful propagation and
temporal delay of both the one and two-photon Fock-states, while a significant
delay (5x initial photon length) with simultaneous high transmission (~90 %) is
achieved.
