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arXiv 0901.0724math-phmath.APmath.MP
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阻尼时谐场中的电离

Ionization in damped time-harmonic fields

O. Costin, M. Huang, Z. Qiu

摘要:

本文研究了一个简单的一维脉冲电离模型中波函数的渐近行为,其中含时势为$V(x,t)=-2δ(x)(1-e^{-λt} \cosωt)$,其中$δ$为Dirac分布。我们发现所有的$λ$和$ω$的电离概率在极限$t\to\infty$。长脉冲极限是非常奇异的,对于$ω=0$,生存概率是$const λ^{1/3}$,远大于$O(λ)$,即突变对应物$V(x,t)=δ(x)\mathbf{1}_{\{t\ge 1/λ\}}$中的概率,其中$\mathbf{1}$是海维赛德函数。

英文摘要:

We study the asymptotic behavior of the wave function in a simple one dimensional model of ionization by pulses, in which the time-dependent potential is of the form $V(x,t)=-2δ(x)(1-e^{-λt} \cosωt)$, where $δ$ is the Dirac distribution. We find the ionization probability in the limit $t\to\infty$ for all $λ$ and $ω$. The long pulse limit is very singular, and, for $ω=0$, the survival probability is $const λ^{1/3}$, much larger than $O(λ)$, the one in the abrupt transition counterpart, $V(x,t)=δ(x)\mathbf{1}_{\{t\ge 1/λ\}}$ where $\mathbf{1}$ is the Heaviside function.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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