  A simplified theory for the wavepackets of the photons emitted during the
read process of a quantum memory formed by cold atoms is provided. We arrive at
analytical expressions for the single- and double-photon emissions, evidencing
superradiant features in both cases. In the two-photon case, both photons are
emitted in the same spatiotemporal mode, characterizing a superradiant emission
of a Fock state of light with two excitations. Experiments confirm the
theoretical predictions with a satisfactory agreement.
