Localization transition of stiff directed lines in random media.

Localization transition of stiff directed lines in random media.
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随机介质中刚性有向线的局域化转变

DOI:
10.1103/physreve.86.060102
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发表时间:
2012
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
J. Kierfeld
J. Kierfeld
中科院分区:
--
文献类型:
--
作者:
H.-H. Boltz;J. Kierfeld

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利用短时随机势研究了具有弯曲能的刚性有向线的局部化问题。利用微扰参数、Flory参数和副本计算,我们证明了刚性有向线维度在无序度增加的情况下经历局域化转变。我们证明了这种转变可以通过数值转移矩阵计算维数来实现,并分析了无序主导相的性质。在双副本问题的基础上,我们提出了刚性有向线尺寸的局部化与张力有向线尺寸的局部化之间的关系,该关系得到了相同的自由能分布的有力支持。这表明,复制哈密顿量中的对相互作用决定了有向线局域化转换的性质,从而影响了kardar - paris - zhang (KPZ)方程的临界行为。此外,我们量化了刚性定向线的持续长度是如何被无序减少的。
We investigate the localization of stiff directed lines with bending energy by a short-range random potential. Using perturbative arguments, Flory arguments, and a replica calculation, we show that a stiff directed line indimensions undergoes a localization transition with increasing disorder for. We demonstrate that this transition is accessible by numerical transfer matrix calculations indimensions and analyze the properties of the disorder-dominated phase. On the basis of the two-replica problem, we propose a relation between the localization of stiff directed lines indimensions and of directed lines under tension indimensions, which is strongly supported by identical free energy distributions. This shows that pair interactions in the replicated Hamiltonian determine the nature of directed line localization transitions with consequences for the critical behavior of the Kardar-Parisi-Zhang (KPZ) equation. Furthermore, we quantify how the persistence length of the stiff directed line is reduced by disorder.
DOI: 10.1103/physreva.44.2345
发表时间: 1991-08
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影响因子: --
作者:
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