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Quantum Control of Population Transfer and Vibrational States via Chirped Pulses in Four Level Density Matrix Equations

Department de Fisica, Universitat Politecnica de Catalunya, Colom 11, Terrassa 08222, Spain
Author to whom correspondence should be addressed.
Academic Editor: Antonella Bogoni
Appl. Sci. 2016, 6(11), 351;
Received: 22 September 2016 / Revised: 24 October 2016 / Accepted: 8 November 2016 / Published: 15 November 2016
(This article belongs to the Special Issue Ultrashort Optical Pulses)
PDF [2818 KB, uploaded 15 November 2016]


We investigate the effect of chirped excitation and the excitation detuning on the coherent control of population transfer and vibrational states in a four-level system. Density matrix equations are studied for optimally enhanced processes by considering specific parameters typical of oxazine systems. Our simulations show a strong dependence on the interplay between chirp and excitation detuning and predict enhancement factors up to 3.2 for population transfer and up to 38.5 for vibrational coherences of electronic excited states. The study of the dynamics of the populations and vibrational coherences involved in the four-level system allows an interpretation of the different enhancement/suppression processes observed. View Full-Text
Keywords: coherent control; chirped pulses; density matrix equations coherent control; chirped pulses; density matrix equations

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Afa, I.J.; Serrat, C. Quantum Control of Population Transfer and Vibrational States via Chirped Pulses in Four Level Density Matrix Equations. Appl. Sci. 2016, 6, 351.

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