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Manipulation of dark states and control of coherent processes with spectrally broad light M. Auzinsh,1,2,* N. N. Bezuglov,2,
 

Summary: Manipulation of dark states and control of coherent processes with spectrally broad light
M. Auzinsh,1,2,* N. N. Bezuglov,2,
and K. Miculis2
1
Department of Physics and Mathematics, University of Latvia, 19 Rainis Boulevard, LV-1586 Riga, Latvia
2
Laser Centre, University of Latvia, LV-1586 Riga, Latvia
Received 7 September 2008; published 25 November 2008
The formation of dark states under an interaction of degenerate atomic states with incoherent broadband
radiation white light is discussed. A simple coupling scheme in a three level 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 system and revealed that
high efficiency attaining 100% of stimulated Raman adiabatic passagelike 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.
DOI: 10.1103/PhysRevA.78.053415 PACS number s : 32.80.Qk, 32.60. i
I. INTRODUCTION
Coherent laser fields can be used to manipulate atomic

  

Source: Auzinsh, Marcis - Department of Physics, University of Latvia

 

Collections: Physics