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arXiv 1306.5301math.APmath.OA
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广义亚辛算子与Sjöstrand类中带位势的薛定谔方程

Generalized Metaplectic Operators and the Schrödinger Equation with a Potential in the Sjöstrand Class

Elena Cordero, Karlheinz Gröchenig, Fabio Nicola, Luigi Rodino

摘要:

众所周知,亚辛算子关于相空间位移的矩阵沿着线性辛映射的图集中。我们表明,代数所产生的元算子和伪微分算子在Sjöstrand类享有相同的衰减特性。我们研究了这些广义亚代数算子的行为,并将它们用傅里叶积分算子表示。我们的主要结果表明,由一个具有Sjöstrand类势的Hamilton算子生成的单参数群由广义亚代数算子组成。因此,薛定谔方程保持了相空间浓度,如调制空间范数所测量的。

英文摘要:

It is well known that the matrix of a metaplectic operator with respect to phase-space shifts is concentrated along the graph of a linear symplectic map. We show that the algebra generated by metaplectic operators and by pseudodifferential opertators in a Sjöstrand class enjoys the same decay properties. We study the behavior of these generalized metaplectic operators and represent them by Fourier integral operators. Our main result shows that the one-parameter group generated by a Hamiltonian operator with a potential in the Sjöstrand class consists of generalized metaplectic operators. As a consequence, the Schrödinger equation preserves the phase-space concentration, as measured by modulation space norms.

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