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arXiv 2212.07573math-phmath.MP
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全行矩阵薛定谔方程的因式分解及向半行散射的酉变换

Factorization for the full-line matrix Schrödinger equation and a unitary transformation to the half-line scattering

Tuncay Aktosun, Ricardo Weder

AI总结:

本文分析了全行矩阵薛定谔方程的散射矩阵,提出势分解因式分解公式,建立全行与半行算子间的酉变换,并据此证明全行Levinson定理及其与半行的联系。

摘要:

当相应的矩阵值势是自伴的、可积的且具有有限一阶矩时,本文分析了全行矩阵薛定谔方程的散射矩阵。将矩阵值势分解为有限数量的片段,并提出一个因式分解公式,用片段的矩阵值散射系数来表示原矩阵值散射系数。利用该因式分解公式,提供了一些显式例子,说明一般情况下左右矩阵值透射系数不相等。通过适当关联全行和半行势,在全行矩阵薛定谔算子与具有特定自伴边界条件的半行矩阵薛定谔算子之间建立了酉变换。利用该酉变换,建立了全行与半行量之间的关系,如 Jost 解、物理解和散射矩阵。利用相应全行和半行散射矩阵之间的联系,证明了全行上的 Levinson 定理,并将其与半行上的 Levinson 定理联系起来。

英文摘要:

The scattering matrix for the full-line matrix Schrödinger equation is analyzed when the corresponding matrix-valued potential is selfadjoint, integrable, and has a finite first moment. The matrix-valued potential is decomposed into a finite number of fragments, and a factorization formula is presented expressing the matrix-valued scattering coefficients in terms of the matrix-valued scattering coefficients for the fragments. Using the factorization formula, some explicit examples are provided illustrating that in general the left and right matrix-valued transmission coefficients are unequal. A unitary transformation is established between the full-line matrix Schrödinger operator and the half-line matrix Schrödinger operator with a particular selfadjoint boundary condition and by relating the full-line and half-line potentials appropriately. Using that unitary transformation, the relations are established between the full-line and the half-line quantities such as the Jost solutions, the physical solutions, and the scattering matrices. Exploiting the connection between the corresponding full-line and half-line scattering matrices, Levinson's theorem on the full line is proved and is related to Levinson's theorem on the half line.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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