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Variable amplitude equations for one-dimensional scattering

✍ Scribed by Y Tikochinsky


Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
617 KB
Volume
103
Category
Article
ISSN
0003-4916

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✦ Synopsis


Nonlinear first-order equations, similar to Calogero's equations, are derived for the forward and backward one-dimensional scattering amplitudes. In particular, the even potential case yields two uncoupled equations for the even and odd parity phase shifts. The present approach provides a fast and accurate means for the numerical solution of onedimensional scattering problems. It also has many analytic merits, some of which are discussed. The connection between one-dimensional and three-dimensional high-energy scattering is reviewed. It is demonstrated that in the one-dimensional case, a slightly modified WKB wavefunction provides an excellent approximation to the exact wavefunction in the shortwave limit. In this limit, additivity of phase shifts for nonoverlapping static potentials is satisfied.


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