Collective coherent population trapping in a thermal field

Macovei, M, Ficek, Z and Keitel, CH (2006) Collective coherent population trapping in a thermal field. Physical Review A, 73 -: . doi:10.1103/PhysRevA.73.063821

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
UQ79726.pdf Full text (open access) application/pdf 179.61KB 5

Author Macovei, M
Ficek, Z
Keitel, CH
Title Collective coherent population trapping in a thermal field
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2006
Sub-type Article (original research)
DOI 10.1103/PhysRevA.73.063821
Open Access Status File (Publisher version)
Volume 73
Issue -
Total pages 9
Editor B Crasemann
Place of publication United States
Publisher American Physical Society
Collection year 2006
Language eng
Subject C1
240301 Atomic and Molecular Physics
780102 Physical sciences
Abstract We analyze the efficiency of coherent population trapping (CPT) in a superposition of the ground states of three-level atoms under the influence of the decoherence process induced by a broadband thermal field. We show that in a single atom there is no perfect CPT when the atomic transitions are affected by the thermal field. The perfect CPT may occur when only one of the two atomic transitions is affected by the thermal field. In the case when both atomic transitions are affected by the thermal field, we demonstrate that regardless of the intensity of the thermal field the destructive effect on the CPT can be circumvented by the collective behavior of the atoms. An analytic expression was obtained for the populations of the upper atomic levels which can be considered as a measure of the level of thermal decoherence. The results show that the collective interaction between the atoms can significantly enhance the population trapping in that the population of the upper state decreases with an increased number of atoms. The physical origin of this feature is explained by the semiclassical dressed-atom model of the system. We introduce the concept of multiatom collective coherent population trapping by demonstrating the existence of collective (entangled) states whose storage capacity is larger than that of the equivalent states of independent atoms.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Electromagnetically Induced Transparency
Q-Index Code C1

Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 13 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 9 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 15 Aug 2007, 08:31:53 EST