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Coherent trapping of atomic populations

1978/12/01 by Hugh R. Gray, R. M. Whitley, C. R. Stroud · 9 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum optics and atomic interactions #Laser-Matter Interactions and Applications

paper · doi:10.1364/ol.3.000218

openalex publication_date 1978/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

It is often desirable in laser spectroscopy and isotope separation to extract as much as possible of an atomic or molecular population that is distributed among a number of ground-state sublevels and low-lying metastable levels. We describe a form of coherent trapping that occurs when multiple resonant laser beams are used to couple the various ground states to a common upper level. This effect prevents the extraction of the entire population. We then study the effect with two dye lasers and an atomic beam and suggest possible ways to maximize the pumping efficiency.

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