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Physical Review Letters

Quantum Beats in Superfluorescence and the Role of Superfluorescence Chirping in It

Ranjana Prakash, Naresh Chandra

Published Feb 12, 1979• 7 citations
Publisher

Abstract

A theory of quantum beats in superfluorescence is given which explains some of the recent experimental observations of Vrehen, Hickspoors, and Gibbs. Variations of this experiment and some new experiments are suggested which will throw more light on chirping in superfluorescence and will confirm the change in sign of Lamb shift due to cooperative effects in a highly excited assembly of atoms.

DOI
10.1103/physrevlett.42.443

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Physical Review Letters•Oct 8, 1979•4 citations
A theory of quantum beats in superfluorescence is given which explains some of the recent experimental observations of Vrehen, Hickspoors, and Gibbs. Variations of this experiment and some new experiments are suggested which will throw more light on chirping in superfluorescence and will confirm the change in sign of Lamb shift due to cooperative effects in a highly excited assembly of atoms.
Superfluorescence has been observed at 3 \ensuremath{\mu}m on the 7P7P7P-to-7S7S7S transition in atomic cesium after 2-ns excitation of a 6S6S6S-to-7P7P7P transition. Both in a magnetic field and in zero field, quantum beats have been observed. The beat frequencies correspond not only to initial-level splittings but also to combinations of initial- and final-level splittings. Superfluorescence beats are therefore basically different from single-atom quantum beats.