Localization Transition for Polymers in Poissonian Medium

Localization Transition for Polymers in Poissonian Medium
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DOI:
10.1007/s00220-013-1744-8
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发表时间:
2012-06
影响因子:
2.4
通讯作者:
F. Comets;N. Yoshida
F. Comets;N. Yoshida
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
F. Comets;N. Yoshida

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本文研究了1 +d维随机环境中的定向聚合物模型,该模型由泊松势中的布朗运动给出。我们研究了非均匀性的密度和强度的影响,分别是泊松场的强度参数ν和温度倒数β。我们的结果是:(i)相图上的精细信息,以及临界曲线上的定量估计;(ii)低温和/或大密度下的路径局部化;(iii)对于大νβ 2和有界β,在最喜欢的走廊中的完全局部化。
We study a model of directed polymers in random environment in dimension 1 +d, given by a Brownian motion in a Poissonian potential. We study the effect of the density and the strength of inhomogeneities, respectively the intensity parameterνof the Poisson field and the temperature inverseβ. Our results are: (i) fine information on the phase diagram, with quantitative estimates on the critical curve; (ii) pathwise localization at low temperature and/or large density; (iii) complete localization in a favourite corridor for largeνβ2and boundedβ.