Fock-state superradiance in a cold atomic ensemble

Authors :: Barros, D. F.
Muñoz-Martínez, L. F.
Ortiz-Gutiérrez, L.
Guerra, C. A. E.
Morales, J. E. O.
Moreira, R. S. N.
Alves, N. D.
Tieco, A. F. G.
Felinto, D.
Saldanha, P. L.
Source :: Opt. Comm. 443, 34 (2019)
Publication Year :: 2018
Abstract: 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.<br />Comment: 12 pages, 7 figures