Atomic spin squeezing in three level atoms

O. Civitarese, M. Reboiro, L. Rebon, and D. Tielas

Department of Physics, University of La Plata, c.c. 67 1900, La Plata, Argentina, Faculty of Engineering, University of Lomas de Zamora, c.c. Km 2, (1836) Lavallol, Argentina.

Recibido el 6 de febrero de 2008
Aceptado el 28 de abril de 2008

Abstract

The conditions under which squeezing occurs, in a system of Rb atoms and photons, are modelled by describing atom–photon interactions in three atomic levels. The time evolution of the spin population is calculated for different initial conditions. It is found that the use of coherent states does not suffice for the transfer of spin between the atoms.

Keywords: Squeezing; three level atoms; laser field; coherent states.

Resumen

Se estudia la transferencia de espín entre un campo de radiación y un sistema atómico compuesto por átomos con tres niveles activos (87Rb). La evolución temporal de la población de niveles, calculada a partir de las soluciones del modelo propuesto, muestra que la utilización de estados coherentes no garantiza la óptima transferencia de espín bajo las condiciones de squeezing.

Descriptores: Compresión; átomos con tres niveles, campo de laser; estados coherentes.

PACS: 03.65.Fd; 42.50.–p; 42.50.Hz

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Acknowledgments

This work was partially supported by the National Research Council of Argentine (CONICET).

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