| 内部棘轮 |
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| 引用本文： | 吕艳,王海燕,包景东.内部棘轮[J].物理学报,2010,59(7):4466-4471. |
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| 作者姓名： | 吕艳 王海燕 包景东 |
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| 作者单位： | 北京师范大学物理系,北京,100875 |
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研基金 |
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| 摘 要： | 建立了一个内部棘轮模型,即将一个自由系统耦合到一个具有非对称周期结构的亚系统上,而后者处于一个热浴环境之中.计算了一个周期信号以两种方式驱动粒子的平均速度,并与相同参数下外部棘轮的结果进行了比较.结果表明,内部棘轮中的粒子定向流的极大值大于外部棘轮的;在相同温度下,内部棘轮中粒子更容易产生定向运动.
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| 关 键 词： | 定向输运 级联耦合 内部棘轮 流增大 |
| 收稿时间： | 2009-10-13 |
Internal ratchet |
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| Lü Yan,Wang Hai-Yan,Bao Jing-Dong.Internal ratchet[J].Acta Physica Sinica,2010,59(7):4466-4471. |
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| Authors: | Lü Yan Wang Hai-Yan Bao Jing-Dong |
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| Institution: | Department of Physics, Beijing Normal University, Beijing 100875, China |
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| Abstract: | An internal ratchet model is established, in which a force-free system is coupled to a subsystem with asymmetric periodic structure, while the latter is in a thermal bath environment. The average velocities of particles driven by a periodic signal in two ways are calculated respectively. In comparison with the result of external ratchet with the same parameters, our results show that the maximum directional current of particles in internal ratchet is larger than that in external ratchet. Under the same temperature, the particles in the internal ratchet are more prone to directional movement. |
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| Keywords: | directional transport cascade coupling internal ratchet current increase |
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