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arXiv quant-ph/0609112quant-phnlin.SI
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正则系统中量子运动的稳定性:一致半经典方法

Stability of quantum motion in regular systems: a uniform semiclassical approach

Wen-ge Wang, G. Casati, Baowen Li

摘要:

研究了经典正则系统在小扰动下量子运动的稳定性。在统一的半经典理论基础上,我们导出了具有相当复杂行为的保真度衰减,即从高斯衰减到幂律衰减的$t^{-α}$与$1 \le α\le 2$。给出了分离不同衰减区域的时间尺度的半经典估计,并给出了数值结果,证实了我们的理论预测。

英文摘要:

We study the stability of quantum motion of classically regular systems in presence of small perturbations. Onthe base of a uniform semiclassical theory we derive the fidelity decay which displays a quite complexbehaviour, from Gaussian to power law decay $t^{-α}$ with $1 \le α\le 2$. Semiclassical estimates are given for the time scales separating the different decaying regions and numerical results are presented which confirm our theoretical predictions.

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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