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arXiv math-ph/9908009math-phmath.MP
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三维移动点相互作用的薛定谔方程

Schrodinger Equation with Moving Point Interactions in Three Dimensions

G. F. Dell'Antonio, R. Figari, A. Teta

摘要:

我们考虑R^3中非相对论性量子粒子在n点相互作用下的运动,这些相互作用沿给定的光滑轨迹运动。由于含时相互作用的奇异性,相应的薛定谔方程没有强意义上的解,而且,标准的微扰技术不能使用。在这里,我们证明了,光滑的初始数据,有一个唯一的弱解,通过减少问题的解决方案的Volterra积分方程只涉及时间变量。它还表明,该演化算子唯一地扩展到$L^{2}(R^{3})$中的酉算子。

英文摘要:

We consider the motion of a non relativistic quantum particle in R^3 subject to n point interactions which are moving on given smooth trajectories. Due to the singular character of the time-dependent interaction, the corresponding Schrodinger equation does not have solutions in a strong sense and, moreover, standard perturbation techniques cannot be used. Here we prove that, for smooth initial data, there is a unique weak solution by reducing the problem to the solution of a Volterra integral equation involving only the time variable. It is also shown that the evolution operator uniquely extends to a unitary operator in $L^{2}(R^{3})$.

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