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arXiv · 0809.1211

Manipulation of Dark States and Control of Coherent Processes with Spectrally Broad Light

Marcis Auzinsh·Nikolai Bezuglov·Kaspars Miculis
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Abstract

The formation of dark states under interaction of degenerate atomic states with incoherent broadband radiation (white light) is discussed. A simple coupling scheme in a three level Lambda-system, which allows both qualitative and quantitative analysis is discussed. We found a stationary solution of the optical Bloch equations in a broad excitation line approximation that describes the dynamics of the atom-white light interaction and demonstrated its identity to a conventional dark state created with coherent laser fields. We than examine the efficiency of the population transfer induced by broadband radiation in a model Lambda-system and revealed that high efficiency (attaining 100 percent) of stimulated Raman adiabatic passage-like processes can be achieved with certain temporal control of light polarization. The corresponding criterion of adiabaticity was formulated and justified by means of numerical simulations.

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Marcis Auzinsh, Nikolai Bezuglov, Kaspars Miculis. 2008-09-07. Manipulation of Dark States and Control of Coherent Processes with Spectrally Broad Light. https://doi.org/10.1103/physreva.78.053415

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