Geodesic
Integrable models of the dynamics of longitudinal-transverse acoustic pulses in a paramagnetic crystal
Teoretičeskaâ i matematičeskaâ fizika, Tome 151 (2007) no. 2, pp. 228-247 Cet article a éte moissonné depuis la source Math-Net.Ru

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We study the interaction between longitudinal-transverse acoustic pulses and a system of paramagnetic impurities with the effective spin $S=1$ in a statically deformed crystal. We show that the dynamics of a pulse propagating at an arbitrary angle to the static-deformation direction and of the effective spins satisfy the modified reduced Maxwell–Bloch equations and, if the spectrum of the acoustic pulse overlaps the quantum transitions between spin sublevels, the modified sine-Gordon equation. These equations generalize the well-known models in the theory of the inverse scattering method and in the theory of self-induced transparency and also belong to the class of integrable equations. Analyzing soliton solutions shows that the pulse–medium interaction reveals some qualitatively new features in these models compared with the cases of purely transverse or purely longitudinal acoustic fields.
Mots-clés : soliton
Keywords: integrable nonlinear equation, self-induced transparency. 
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S. V. Sazonov; N. V. Ustinov. Integrable models of the dynamics of longitudinal-transverse acoustic pulses in a paramagnetic crystal. Teoretičeskaâ i matematičeskaâ fizika, Tome 151 (2007) no. 2, pp. 228-247. http://geodesic.mathdoc.fr/item/TMF_2007_151_2_a4/

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