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Journal Article

Phase-dependent interaction in a four-level atomic configuration

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Morigi,  Giovanna
Laser Physics, Max Planck Institute of Quantum Optics, Max Planck Society;

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Citation

Morigi, G., Franke-Arnold, S., & Oppo, G.-L. (2002). Phase-dependent interaction in a four-level atomic configuration. Physical Review A, 66(5): 053409. 053409. Retrieved from http://link.aps.org/abstract/PRA/v66/e053409.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-C1B1-3
Abstract
We study a four-level atomic scheme interacting with four lasers in a closed-loop configuration with a ◊ (diamond) geometry. We investigate the influence of the laser phases on the steady state. We show that, depending on the phases and the decay characteristic, the system can exhibit a variety of behaviors, including population inversion and complete depletion of an atomic state. We explain the phenomena in terms of multiphoton interference, and compare our results with the phase-dependent phenomena in the double-Λ scheme. This investigation may be useful for developing nonlinear optical devices, and for the spectroscopy and laser cooling of alkali- earth atoms.