Fock-state superradiance in a cold atomic ensemble
D. F. Barros, L. F. Mu\~noz-Mart\'inez, L. Ortiz-Guti\'errez, C. A. E., Guerra, J. E. O. Morales, R. S. N. Moreira, N. D. Alves, A. F. G. Tieco, D., Felinto, and P. L. Saldanha
TL;DR
This paper presents a simplified theoretical model for photon wavepackets emitted during quantum memory readout in cold atomic ensembles, demonstrating superradiant features and experimental validation of Fock state emission with two excitations.
Contribution
It introduces analytical expressions for single- and double-photon emissions, highlighting superradiance in Fock states with two excitations, supported by experimental confirmation.
Findings
Analytical expressions for photon wavepackets derived
Superradiant emission observed in two-photon Fock states
Experimental results agree with theoretical predictions
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.
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