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Title: Interaction of strongly chirped pulses with two-level atoms

Abstract

We study the effect of ultrachirped pulses on the population inversion of two-level atoms. Ultrachirped pulses are defined as those for which the frequency chirp is of the order of the transition frequency of the two-level atom. When the chirp is large enough, the resonance may be crossed twice, for positive and negative frequencies. In fact the decomposition of the field into amplitude and phase factors, and the corresponding definition of the instantaneous frequency, are not unique. The interaction pictures for different decomposition are strictly equivalent, but only as long as approximations are not applied. The domain of validity of the formal rotating wave approximation is dramatically enhanced by a suitable choice, the so-called analytic signal representation.

Authors:
; ;  [1];  [2]
  1. Departamento de Quimica Fisica, Universidad del Pais Vasco - Euskal Herriko Unibertsitatea, Apdo. 644, Bilbao (Spain)
  2. Laboratoire Collisions Agregats Reactivite, CNRS UMR 5589, IRSAMC, Universite Paul Sabatier, 118 Route de Narbonne, F-31062 Toulouse CEDEX 4 (France)
Publication Date:
OSTI Identifier:
22051339
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; AMPLITUDES; APPROXIMATIONS; ATOMS; INTERACTIONS; POPULATION INVERSION; POWER FACTOR; PULSES; RESONANCE

Citation Formats

Ibanez, S., Peralta Conde, A., Muga, J. G., and Guery-Odelin, D. Interaction of strongly chirped pulses with two-level atoms. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.013428.
Ibanez, S., Peralta Conde, A., Muga, J. G., & Guery-Odelin, D. Interaction of strongly chirped pulses with two-level atoms. United States. doi:10.1103/PHYSREVA.84.013428.
Ibanez, S., Peralta Conde, A., Muga, J. G., and Guery-Odelin, D. Fri . "Interaction of strongly chirped pulses with two-level atoms". United States. doi:10.1103/PHYSREVA.84.013428.
@article{osti_22051339,
title = {Interaction of strongly chirped pulses with two-level atoms},
author = {Ibanez, S. and Peralta Conde, A. and Muga, J. G. and Guery-Odelin, D.},
abstractNote = {We study the effect of ultrachirped pulses on the population inversion of two-level atoms. Ultrachirped pulses are defined as those for which the frequency chirp is of the order of the transition frequency of the two-level atom. When the chirp is large enough, the resonance may be crossed twice, for positive and negative frequencies. In fact the decomposition of the field into amplitude and phase factors, and the corresponding definition of the instantaneous frequency, are not unique. The interaction pictures for different decomposition are strictly equivalent, but only as long as approximations are not applied. The domain of validity of the formal rotating wave approximation is dramatically enhanced by a suitable choice, the so-called analytic signal representation.},
doi = {10.1103/PHYSREVA.84.013428},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}