摘要翻译:
我们提出了一个布朗尺蠖模型的自推进弹性二聚体在没有外势。非平衡噪声和依赖于伸展的阻尼形成了推进机制。我们的模型连接了三个关键的非平衡特征--位置-速度关联、非零平均内力和漂移速度。我们的分析结果,包括冲击电流反向,与数值模拟相比很好。该模型统一了DNA螺旋酶、振动表面上的极性棒、爬行的角化细胞和肌球蛋白VI的推进机制。我们提出了模型的实验实现和检验。
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英文标题:
《Active elastic dimers: self-propulsion and current reversal on a
featureless track》
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作者:
K. Vijay Kumar, Sriram Ramaswamy, Madan Rao
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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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一级分类:Quantitative Biology 数量生物学
二级分类:Biomolecules 生物分子
分类描述:DNA, RNA, proteins, lipids, etc.; molecular structures and folding kinetics; molecular interactions; single-molecule manipulation.
DNA、RNA、蛋白质、脂类等;分子结构与折叠动力学;分子相互作用;单分子操作。
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英文摘要:
We present a Brownian inchworm model of a self-propelled elastic dimer in the absence of an external potential. Nonequilibrium noise together with a stretch-dependent damping form the propulsion mechanism. Our model connects three key nonequilibrium features -- position-velocity correlations, a nonzero mean internal force, and a drift velocity. Our analytical results, including striking current reversals, compare very well with numerical simulations. The model unifies the propulsion mechanisms of DNA helicases, polar rods on a vibrated surface, crawling keratocytes and Myosin VI. We suggest experimental realizations and tests of the model.
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PDF链接:
https://arxiv.org/pdf/708.1802


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