A phenomenological model for collisional coherence transfer in an optically pumped atomic system

K Khanbekyan (1) , G Bevilaqua (1) , A Khanbekyan (2) , E Mariotti (1) , A Papoyan (2) , L Moi (1)

1 UNISI - Università degli Studi di Siena = University of Siena
2 IPR - Institute for Physical Research

We consider a dual Λ-system under double laser excitation to investigate the possibility of indirect coherence transfer between atomic ground states through an excited state. The atomic system is excited by a frequency modulated pump laser and probed by a low-power cw laser. All the decoherence mechanisms are discussed and taken into account. Adjustment of parameters of the two radiations aimed at maximization of coherence transfer is addressed. The study can help to understand phenomena as collisional transfer of coherence and can find application in the experimental realization of atomic sensors.

Mots clés: 32.70.-n; 32.70.Jz; 33.40.+f; 33.57.+c

K Khanbekyan, G Bevilaqua, A Khanbekyan, E Mariotti, A Papoyan, et al.. A phenomenological model for collisional coherence transfer in an optically pumped atomic system. Journal of Physics B: Atomic, Molecular and Optical Physics, 2011, 44 (5), pp.55502. ⟨10.1088/0953-4075/44/5/055502⟩. ⟨hal-00600141⟩