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arXiv 1006.0905quant-phphysics.atom-ph
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控制势垒对称性对隧穿的增强和抑制

Enhancement and suppression of tunneling by controlling symmetries of a potential barrier

Denys I. Bondar, Wing-Ki Liu, Misha Yu. Ivanov

摘要:

我们提出了一类2D系统,它显示出与半经典直觉相矛盾的反直觉性质:一个二维量子粒子“更喜欢”隧穿势垒而不是在势垒上方行进。将一个粒子的二维系统看作两个一维粒子的系统,证明了这种效应是由于势垒的特定对称性而发生的,该对称性迫使粒子间自由度的激发,进而导致有效势垒的出现,即使不存在“真实”势垒。这种现象在1D中不存在。

英文摘要:

We present a class of 2D systems which shows a counterintuitive property that contradicts a semi classical intuition: A 2D quantum particle "prefers" tunneling through a barrier rather than traveling above it. Viewing the one particle 2D system as the system of two 1D particles, it is demonstrated that this effect occurs due to a specific symmetry of the barrier that forces excitations of the interparticle degree of freedom that, in turn, leads to the appearance of an effective potential barrier even though there is no "real" barrier. This phenomenon cannot exist in 1D.

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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