摘要翻译:
我们提出了一种蒙特卡罗方法,它允许对立方格上的哈密顿游动进行有效的无偏采样。这样的行走是自我避免的,并访问每个点阵站点一次。在加入适当的局部相互作用后,它们通常被用作球状蛋白质的简单模型。我们的算法可以很容易地装备这样的相互作用,但我们在这里主要研究柔性均聚物的情况,其中每个构象是以均匀的概率产生的。我们证明了该算法是遍历的,并且具有动态指数z=0。然后我们用它来研究粒径达64^3=262144个单体的聚合物。结果表明,端点之间的有效相互作用,以及与系统边界的相互作用。
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英文标题:
《Unbiased sampling of globular lattice proteins in three dimensions》
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作者:
Jesper Lykke Jacobsen (LPTMS, SPhT)
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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一级分类:Physics 物理学
二级分类:Soft Condensed Matter 软凝聚态物质
分类描述:Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜,聚合物,液晶,玻璃,胶体,颗粒物质
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英文摘要:
We present a Monte Carlo method that allows efficient and unbiased sampling of Hamiltonian walks on a cubic lattice. Such walks are self-avoiding and visit each lattice site exactly once. They are often used as simple models of globular proteins, upon adding suitable local interactions. Our algorithm can easily be equipped with such interactions, but we study here mainly the flexible homopolymer case where each conformation is generated with uniform probability. We argue that the algorithm is ergodic and has dynamical exponent z=0. We then use it to study polymers of size up to 64^3 = 262144 monomers. Results are presented for the effective interaction between end points, and the interaction with the boundaries of the system.
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PDF链接:
https://arxiv.org/pdf/709.2323