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arXiv 0806.3151cond-mat.stat-mech
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反应扩散系统中噪声诱导斑图形成的熵驱动机制

Entropy driven mechanism for noise induced patterns formation in reaction-diffusion systems

D. O. Kharchenko, S. V. Kokhan, A. V. Dvornichenko

摘要:

我们研究了具有局部动力学和非Fickian扩散的随机系统中熵驱动的稳态模式形成机制。我们已经表明,满足涨落耗散关系的乘性噪声能够诱导和维持其强度增长的平稳结构。结果发现,在小的和大的噪声强度的系统的特点是不稳定的均匀状态。在噪声强度的中间值,三种类型的图案是可能的:成核,spinodal分解和条纹与线性缺陷(位错)。我们的分析调查验证了计算机模拟。

英文摘要:

We have studied the entropy-driven mechanism leading to stationary patterns formation in stochastic systems with local dynamics and non-Fickian diffusion. We have shown that a multiplicative noise fulfilling a fluctuation-dissipation relation is able to induce and sustain stationary structures with its intensity growth. It was found that at small and large noise intensities the system is characterized by unstable homogeneous states. At intermediate values of the noise intensity three types of patterns are possible: nucleation, spinodal decomposition and stripes with liner defects (dislocations). Our analytical investigations are verified by computer simulations.

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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