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Q: Fachverband Quantenoptik und Photonik

Q 17: Quantum Optics (Miscellaneous) III

Q 17.4: Talk

Tuesday, March 15, 2022, 11:30–11:45, Q-H14

Superradiance in an ensemble of multilevel atoms — •Aleksei Konovalov and Giovanna Morigi — University Des Saarlandes

We derive a master equation for a superradiant medium which includes multilevel interference between the individual scatterers. The derivation relies on the Born-Markov approximation and implements the coarse-graining formalism. The master equation fulfills the Lindblad form and contains terms describing multilevel interference between parallel transitions of a single atom, multiatom interference between identical transitions, and multiatom interference between different electronic transitions with parallel dipoles. This formalism is then applied to determine the excitation spectrum of two emitters using the parameters of the hydrogen transitions 2S1/2 ? 4P1/2 and 2S1/2 ? 4P3/2, where the gap between the parallel dipoles is of the order of GHz. The distortion of the signal due to the interplay of multilevel and multiemitter interference is analyzed as a function of their distance. We then derive the limit in which the atomic transitions can be described by oscillators and analyse the predictions for an ensemble of Rb87 atoms driven by a laser below saturation.

[1] Aleksei Konovalov and Giovanna Morigi Phys. Rev. A 102, 013724 (2020)