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arXiv math-ph/0506049math-phmath.MP
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周期电场中短程系统的逆散射问题

An inverse scattering problem for short-range systems in a time-periodic electric field

François Nicoleau

摘要:

考虑$L^2(R^n)$上的含时哈密顿量$H(t)= {1 \over 2} p^2 -E(t) \cdot x + V(t,x)$,其中外电场$E(t)$和短程电势$V(t,x)$具有相同的时间周期.众所周知,短程概念取决于外场的平均值$E\_0$。当$E\_0=0$时,我们证明了散射算子的高能量极限唯一地决定了$V(t,x)$。在另一种情况下,相同的结果在一般sghort-range势的维度$n \geq 3$中成立。在二维空间中,我们必须假设电势有更强的衰减。

英文摘要:

We consider the time-dependent Hamiltonian $H(t)= {1 \over 2} p^2 -E(t) \cdot x + V(t,x)$ on $L^2(R^n)$, where the external electric field $E(t)$ and the short-range electric potential $V(t,x)$ are time-periodic with the same period. It is well-known that the short-range notion depends on the mean value $E\_0$ of the external field. When $E\_0=0$, we show that the high energy limit of the scattering operators determines uniquely $V(t,x)$. In the other case, the same result holds in dimension $n \geq 3$ for generic sghort-range potentials. In dimension 2, one has to assume a stronger decay on the electric potential.

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