arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1006.0875math.PR
收藏

具有$(\nabla + Δ)$相互作用的(1+1)维钉扎模型的局部化

Localization for (1+1)-dimensional pinning models with $(\nabla + Δ)$-interaction

Martin Borecki, Francesco Caravenna

摘要:

研究了一类被缺陷线吸引的均匀线性链的有向模型中的定域/离域相变。链的自相互作用是混合梯度和拉普拉斯型的,而对缺陷线的吸引是$δ$ -钉扎型的,强度为$ε\geq 0$。众所周知,当自相互作用是纯粹的拉普拉斯算子时,这种模型会经历一个非平凡的相变:为了将链定位在缺陷线上,奖励$ε$必须大于严格的正临界阈值$ε_c > 0$。另一方面,当自相互作用是纯梯度时,已知转移是平凡的:任意小的奖励$ε> 0$足以将链定位在缺陷线($ε_c = 0$)处。本文证明了在混合梯度和Laplacian情形下,在相互作用势的最小假设下,跃迁总是平凡的,即$ε_c = 0$ .

英文摘要:

We study the localization/delocalization phase transition in a class of directed models for a homogeneous linear chain attracted to a defect line. The self-interaction of the chain is of mixed gradient and Laplacian kind, whereas the attraction to the defect line is of $δ$-pinning type, with strength $ε\geq 0$. It is known that, when the self-interaction is purely Laplacian, such models undergo a non-trivial phase transition: to localize the chain at the defect line, the reward $ε$ must be greater than a strictly positive critical threshold $ε_c > 0$. On the other hand, when the self-interaction is purely gradient, it is known that the transition is trivial: an arbitrarily small reward $ε> 0$ is sufficient to localize the chain at the defect line ($ε_c = 0$). In this note we show that in the mixed gradient and Laplacian case, under minimal assumptions on the interaction potentials, the transition is always trivial, that is $ε_c = 0$.

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。

↑