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Optimal designing of polychromatic field for maximum dissociation of LiH molecule

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Abstract

We present a strategy for enhancing the dissociation probability of a diatomic molecule, namely LiH, by designing optimal laser pulse. Dissociation dynamics is followed by solving time-dependent Schrödinger equation using time-dependent Fourier Grid Hamiltonian technique with optimal laser pulse function, generated by using the stochastic optimization technique of simulated annealing. We show that as we increase number of variable parameters while designing the optimal time dependent perturbation, higher dissociation is obtained. The step-wise increase in dissociation probability with the increase in complexity of designed pulse is clearly shown.

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Acknowledgments

S. S. thanks UGC, New Delhi for granting a D. S. Kothari post-doctoral fellowship. S. T. acknowledges the financial support form UGC, New Delhi, for granting a senior Research Fellowship. P. C. thanks UGC for the award of a major research project.

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Authors and Affiliations

  1. Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata, 700 009, India

    S. Sen, S. Talukder & P. Chaudhury

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  1. S. Sen
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  2. S. Talukder
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  3. P. Chaudhury
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Correspondence to P. Chaudhury.

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Sen, S., Talukder, S. & Chaudhury, P. Optimal designing of polychromatic field for maximum dissociation of LiH molecule. Indian J Phys 87, 865–872 (2013). https://doi.org/10.1007/s12648-013-0307-3

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  • DOI: https://doi.org/10.1007/s12648-013-0307-3

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