Natural line shape

The observable line shape of the spontaneous emission depends on the procedure of atom's excitation. The spectrum of radiation emitted by a two-level atom excited from the ground state by a pi pulse of the resonant pump field is calculated for the case when the Rabi frequency is much larger tha...

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Bibliographic Details
Published in:arXiv.org 2008-02
Main Author: Elyutin, P V
Format: Article
Language:English
Subjects:
Excitation spectra
Line shape
Line spectra
Rabi frequency
Spontaneous emission
Online Access:Get full text
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Summary:The observable line shape of the spontaneous emission depends on the procedure of atom's excitation. The spectrum of radiation emitted by a two-level atom excited from the ground state by a pi pulse of the resonant pump field is calculated for the case when the Rabi frequency is much larger than the relaxation rate. It is shown that the central part of the spectral distribution has a standard Lorentzian form, whereas for detunings from the resonance that are larger than the Rabi frequency the spectral density falls off faster. The shape of the wings of the spectral line is sensitive to the form of the pi pulse. The implications for the quantum Zeno effect theory and for the estimates of the duration of quantum jumps are discussed.
ISSN:2331-8422
DOI:10.48550/arxiv.0802.0913