| 在非绝热记忆棘轮中信号与噪声耦合控制流 |
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| 引用本文： | 宋艳丽,包景东.在非绝热记忆棘轮中信号与噪声耦合控制流[J].北京师范大学学报(自然科学版),2004,40(2):196-200. |
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| 作者姓名： | 宋艳丽 包景东 |
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| 作者单位： | 北京师范大学物理学系,100875,北京;北京师范大学物理学系,100875,北京 |
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| 基金项目： | 国家自然科学基金，教育部跨世纪优秀人才培养计划 |
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| 摘 要： | 建立了一个研究布朗马达输运的非绝热和记忆棘轮模型,即用一个外部非偏压周期力去驱动一个处于记忆阻尼环境和内部简谐噪声作用下的布朗粒子,在非对称周期势中产生定向流.结果表明:随着内噪声频率的变化,粒子流发生反转且负向极大流所对应的外部信号频率也随之不同,则粒子流的方向和大小是由外部信号和内部噪声相互耦合控制的,这是一种动力学共振.
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| 关 键 词： | 记忆棘轮 热简谐噪声 速度流 |
| 修稿时间： | 2003年11月14日 |
CURRENT CONTROLLED BY COUPLING BETWEEN SIGNAL AND NOISE IN THE DIABATIC MEMORY RATCHET |
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| Song Yanli,Bao Jingdong.CURRENT CONTROLLED BY COUPLING BETWEEN SIGNAL AND NOISE IN THE DIABATIC MEMORY RATCHET[J].Journal of Beijing Normal University(Natural Science),2004,40(2):196-200. |
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| Authors: | Song Yanli Bao Jingdong |
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| Abstract: | A model for the Brownian motor moving in a diabatic and memory ratchet is proposed. The particle in such a ratchet driven by an internal harmonic noise and an external periodic signal exists a directional current. The results show that the signal frequency where reversal and negative maximum of the current occur varies when the frequency of noise changes. Coupling between internal noise and external signal controls the direction and the magnitude of the current. This is a phenomenon of dynamic resonance. |
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| Keywords: | memory ratchet thermal harmonic noise velocity current |
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