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J Opt B Quantum Semiclassical Opt. 2005 Oct;7(10):S265-S269.

Multiphoton coherent control in complex systems.

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  • Indian Institute of Technology, Kanpur 208016, India.


Control of multiphoton transitions is demonstrated for a multilevel system by generalizing the instantaneous phase of any chirped pulse as individual terms of a Taylor series expansion. In the case of a simple two-level system, all odd terms in the series lead to population inversion while the even terms lead to self-induced transparency. The results hold for multiphoton transitions that do not have any lower-order photon resonance or any intermediate virtual state dynamics within the laser pulse width.

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