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arXiv 2211.01985math.APmath.SG
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关于Wigner分布和薛定谔演化的Hardy测不准原理的注记

Notes on Hardy's Uncertainty Principle for the Wigner distribution and Schrödinger evolutions

Helge Knutsen

摘要:

我们考虑具有实二次哈密顿量的薛定谔方程,在给定时刻解的维格纳分布在线性坐标变换下等于初始条件的维格纳分布。基于联合时频表示的Hardy测不准原理,我们证明了这样的薛定谔方程的唯一性结果,其中解在两个不同时刻不可能有强衰减.这种方法再现了已知的,清晰的自由薛定谔方程和谐振子的结果,我们也提出了一个明确的计划,二次系统的基础上正定矩阵。

英文摘要:

We consider Schrödinger equations with real quadratic Hamiltonians, for which the Wigner distribution of the solution at a given time equals, up to a linear coordinate transformation, the Wigner distribution of the initial condition. Based on Hardy's uncertainty principle for the joint time-frequency representation, we prove a uniqueness result for such Schrödinger equations, where the solution cannot have strong decay at two distinct times. This approach reproduces known, sharp results for the free Schrödinger equation and the harmonic oscillator, and we also present an explicit scheme for quadratic systems based on positive definite matrices.

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