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arXiv 1604.06604quant-phphysics.optics
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噪声量子隧穿势引起的反常波函数

Rogue wavefunctions due to noisy quantum tunneling potentials

Cihan Ahmet Bayındır

摘要:

本文研究了白噪声势对非线性量子隧穿的影响。本文采用分步格式数值求解了含隧穿势的非线性薛定谔方程。我们考虑三种不同类型的势,即:单矩形势垒,双矩形势垒和三角形势垒。对于所有这三种情况下,我们表明,白噪声给予潜在的不触发调制不稳定性隧道的sech型孤子解决方案的NLSE。然而,白噪声电位触发调制不稳定性的正弦波函数的隧穿,从而这样的波场变成一个混乱的一个与许多明显的峰值。我们认为,这样一个字段的峰值可能是合理的流氓波解决方案的NLSE的形式。我们的结果可以用来研究噪声对量子隧穿的影响。由于流氓波函数意味着隧穿粒子在给定(x,t)坐标处的概率更高,我们的结果也可以用于发展具有许多可能应用的量子科学和技术,包括但不限于提高扫描隧道显微镜的分辨率和效率,增强质子隧穿DNA突变和增强结的超导性能。

英文摘要:

In this paper we study the effects of white-noised potentials on nonlinear quantum tunneling. We use a split-step scheme to numerically solve the nonlinear Schrodinger equation (NLSE) with a tunneling potential. We consider three different types of potentials, namely; the single rectangular barrier, double rectangular barrier and triangular barrier. For all these three cases we show that white-noise given to potentials do not trigger modulation instability for tunneling of the sech type soliton solutions of the NLSE. However white-noised potentials trigger modulation instability for tunneling of the sinusoidal wavefunctions, thus such a wavefield turns into a chaotic one with many apparent peaks. We argue that peaks of such a field may be in the form of rational rogue wave solutions of the NLSE. Our results can be used to examine the effects of noise on quantum tunneling. Since a rogue wavefunction means a higher probability of the tunneling particle to be at a given (x,t) coordinate, our results may also be used for developing the quantum science and technology with many possible applications including but are not limited to increasing the resolution and efficiency of scanning tunneling microscopes, enhancing proton tunneling for DNA mutation and enhancing superconducting properties of junctions.

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