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arXiv 1206.6592cond-mat.stat-mechcond-mat.dis-nn
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定向聚合物自由能随几何涨落的变温和有限时间标度

Finite-temperature and finite-time scaling of the directed polymer free-energy with respect to its geometrical fluctuations

Elisabeth Agoritsas, Sebastian Bustingorry, Vivien Lecomte, Gregory Schehr, Thierry Giamarchi

摘要:

我们研究了有限相关长度ξ和有限温度下高斯随机环境中1+1维定向聚合物的涨落。我们解决的几何横向波动的定向聚合物,描述其粗糙度,其自由能的波动,其特征在于其两点相关器之间的对应关系。分析参数有利于这些数量之间的通用标度律,在有限时间,非零的温度和明确的温度依赖性。数值结果是在离散定向聚合物和连续定向聚合物(短程相关无序)的模拟都很好的协议。应用最近的实验液晶进行了讨论。

英文摘要:

We study the fluctuations of the directed polymer in 1+1 dimensions in a Gaussian random environment with a finite correlation length ξ and at finite temperature. We address the correspondence between the geometrical transverse fluctuations of the directed polymer, described by its roughness, and the fluctuations of its free-energy, characterized by its two-point correlator. Analytical arguments are provided in favor of a generic scaling law between those quantities, at finite time, non-vanishing ξ and explicit temperature dependence. Numerical results are in good agreement both for simulations on the discrete directed polymer and on a continuous directed polymer (with short-range correlated disorder). Applications to recent experiments on liquid crystals are discussed.

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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