Three-level atom in a broadband squeezed vacuum field. II. Applications

Ficek, Z. and Drummond, P. D. (1991) Three-level atom in a broadband squeezed vacuum field. II. Applications. Physical Review A, 43 11: 6258-6271. doi:10.1103/PhysRevA.43.6258

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Author Ficek, Z.
Drummond, P. D.
Title Three-level atom in a broadband squeezed vacuum field. II. Applications
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 1991
Sub-type Article (original research)
DOI 10.1103/PhysRevA.43.6258
Open Access Status File (Publisher version)
Volume 43
Issue 11
Start page 6258
End page 6271
Total pages 14
Place of publication College Park, MD, United States
Publisher American Physical Society
Subject 3100 Physics and Astronomy
3107 Atomic and Molecular Physics, and Optics
Abstract Using the formalism developed earlier, we treat spontaneous emission from a three-level atom (ladder system) interacting with a broadband squeezed vacuum field. We obtain expressions for the transient and steady-state populations of the atomic levels with the conditions that the atom interacts with either a multimode perfect squeezed vacuum field, or a three-dimensional vacuum field in which the squeezed modes lie within a solid angle over which squeezing is propagated. The results are compared with those obtained for the atom interacting with a thermal field. We show that in the perfect case the first excited state is not populated when the squeezed vacuum field is in a minimum-uncertainty squeezed state. Moreover, the second excited state can have a steady-state population larger than 1/2. These features are completely absent when the atom interacts with the thermal field. In addition, for a low-intensity squeezed vacuum field the population in the second excited state exhibits a linear rather than quadratic dependence on the intensity of the squeezed vacuum field. In the three-dimensional case the presence of unsqueezed modes considerably reduces the effect of squeezing on spontaneous emission. However, a significant reduction in a population of the first excited state and a population larger than 1/2 in the second excited state can be achieved provided the squeezing is propagated over a large solid angle. We also discuss the effect of the two-photon detuning between the double carrier frequency of the squeezing and atomic transition frequency 3 on the steady-state atomic population.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 52 times in Thomson Reuters Web of Science Article | Citations
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