Geodesic
Estimates of the scattering data in a Schrödinger spectral problem on the line
Teoretičeskaâ i matematičeskaâ fizika, Tome 79 (1989) no. 1, pp. 79-92 
E. R. Lubenets. Estimates of the scattering data in a Schrödinger spectral problem on the line. Teoretičeskaâ i matematičeskaâ fizika, Tome 79 (1989) no. 1, pp. 79-92. http://geodesic.mathdoc.fr/item/TMF_1989_79_1_a7/
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     author = {E. R. Lubenets},
     title = {Estimates of~the scattering data {in~a~Schr\"odinger} spectral problem on~the line},
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Voir la notice de l'article provenant de la source Math-Net.Ru

For the Schrödinger spectral problem on the line when $k\in R$ the lower and upper estimates are obtained for the penetration and reflection coefficients in terms of the integral parameters of the potential and $|k|$. Necessary and sufficient conditions of the smallness of the tunneling effect are considered.

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