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arXiv 2301.05907math.AP
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多维非定常薛定谔方程的高能均匀化

High-energy homogenization of a multidimensional nonstationary Schrödinger equation

Mark Dorodnyi

摘要:

在$L_2(\mathbb{R}^d)$中,我们考虑一个椭圆微分算子$\mathcal{A}_\varepsilon = - \operatorname{div} g(\mathbf{x}/\varepsilon) \nabla + \varepsilon^{-2} V(\mathbf{x}/\varepsilon)$,$ \varepsilon > 0$,具有周期系数。对于哈密顿量为$\mathcal{A}_\varepsilon$的非定常薛定谔方程,研究了与算子$\mathcal{A}_1$色散关系中任意点有关的均匀化问题的类似问题(即所谓的高能均匀化问题).对于具有特殊初值的这类方程的Cauchy问题的解,得到了小$\varepsilon$的$L_2(\mathbb{R}^d)$ -模逼近.

英文摘要:

In $L_2(\mathbb{R}^d)$, we consider an elliptic differential operator $\mathcal{A}_\varepsilon = - \operatorname{div} g(\mathbf{x}/\varepsilon) \nabla + \varepsilon^{-2} V(\mathbf{x}/\varepsilon)$, $ \varepsilon > 0$, with periodic coefficients. For the nonstationary Schrödinger equation with the Hamiltonian $\mathcal{A}_\varepsilon$, analogs of homogenization problems related to an arbitrary point of the dispersion relation of the operator $\mathcal{A}_1$ are studied (the so called high-energy homogenization). For the solutions of the Cauchy problems for these equations with special initial data, approximations in $L_2(\mathbb{R}^d)$-norm for small $\varepsilon$ are obtained.

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