Towards spectrally selective catastrophic response
Towards spectrally selective catastrophic response
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DOI：
10.1103/physreve.101.062415
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发表时间：
2020-06-18
影响因子：
2.4
通讯作者：
Kempa, K.
中科院分区：
文献类型：
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作者：
Gabriele, V. R.;Shvonski, A.;Kempa, K.
我们研究了经典分子对电磁辐射的大幅度响应，表明了在足够大的幅度下，从线性响应到非线性响应和破裂的普遍性。我们证明了一系列的模型，从简谐振子到成功的Peyrard-Bishop-Doxois类型的DNA模型，其中包括现实的环境效应(包括由于热涨落引起的衰减和退相)，导致了特征的普遍行为：在驱动力振幅-频率空间中形成解离域，其特征是存在局部边界极小值。我们证明，通过简单地跟踪该空间中共振极大值的级数，当辐射强度逐渐增加时，一个人必然到达这些极小值之一，即保持超高光谱选择性的点。我们证明了这一普适性，适用于其他振荡系统，是这些模型属于Thom突变理论的折叠突变普适类的结果。这反过来意味着，对于大多数生物结构，包括DNA，可以预期在变性过程开始时具有高光谱灵敏度。这种光谱选择性的分子变性可以在生物学和医学上找到重要的应用。
We study the large-amplitude response of classical molecules to electromagnetic radiation, showing the universality of the transition from linear to nonlinear response and breakup at sufficiently large amplitudes. We demonstrate that a range of models, from the simple harmonic oscillator to the successful Peyrard-Bishop-Dauxois type models of DNA, which include realistic effects of the environment (including damping and dephasing due to thermal fluctuations), lead to characteristic universal behavior: formation of domains of dissociation in driving force amplitude-frequency space, characterized by the presence of local boundary minima We demonstrate that by simply following the progression of the resonance maxima in this space, while gradually increasing intensity of the radiation, one must necessarily arrive at one of these minima, i e., a point where the ultrahigh spectral selectivity is retained. We show that this universal property, applicable to other oscillatory systems, is a consequence of the fact that these models belong to the fold catastrophe universality class of Thom's catastrophe theory. This in turn implies that for most biostructures, including DNA, high spectral sensitivity near the onset of the denaturation processes can be expected. Such spectrally selective molecular denaturation could find important applications in biology and medicine.