物理学报Issue(16)：1-7,7.DOI:10.7498/aps.63.160503
空时非对称分数阶类Langevin棘齿
Spatiotemp orally asymmetric fractional Langevin-like ratchet
摘要
Abstract
In this paper, a spatiotemporally asymmetric fractional Langevin-like ratchet is constructed for the operation of a one-dimensional linear molecular motor subjected to both temporally asymmetric unbiased Langevin-like noise generated by the Logistic mapping and spatially asymmetric periodic potential. In this ratchet, the Langevin-like noise is used to describe fluctuations of intracellular surrounding, and the fractional order is responsible for the effect of the non-ideal intracellular surrounding. Then, by deducing the corresponding discrete mapping, dependance of ratchet effect on parameters are numerically investigated. Numerical results show that both the temporal asymmetry of noise and the spatial asymmetry of potential are crucial to the directed-transport of the ratchet, and competitive spatially asymmetric potential can even reverse the unidirected transport generated by the temporally asymmetric noise at suitable parameters.关键词
分子马达/类Langevin噪声/空时非对称/分数阶类Langevin棘齿Key words
molecular motor/Langevin-like noise/spatiotemporal asymmetry/fractional Langevin-like ratchet引用本文复制引用
周兴旺,林丽烽,马洪,罗懋康..空时非对称分数阶类Langevin棘齿[J].物理学报,2014,(16):1-7,7.基金项目
国家自然科学基金(批准号:11171238)和福建农林大学青年教师基金(批准号:2011XJJ23)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant No.11171238) and the Young Teacher Foundation of Fujian Agriculture and Forestry University, China (Grant No.2011XJJ23) （批准号:11171238）
