arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.0508cond-mat.stat-mech
收藏

布朗粒子在振荡驱动下的功和热分布

Work and heat distributions for a Brownian particle subjected to an oscillatory drive

Bappa Saha, Sutapa Mukherji

摘要:

利用Onsager-Machlup泛函积分方法,我们得到了布朗粒子在受约束简谐势和振荡驱动力作用下的功分布函数和耗散热分布.在长的时间限制中,功分布函数的宽度最初随着驱动力的频率而增加,并且最终对于角频率的大值饱和到固定值。利用功分布部分的结果,我们接下来获得平衡初始条件下的耗散热分布。使用最速下降法,我们得到了一个高斯分布的小波动在大的时间限制。在一定时间内,得到了分布函数的数值解.它表明,热分布,在一般情况下,不满足瞬态波动定理。

英文摘要:

Using the Onsager-Machlup functional integral approach, we obtain the work distribution function and the distribution of the dissipated heat of a Brownian particle subjected to a confining harmonic potential and an oscillatory driving force. In the long time limit, the width of the work distribution function initially increases with the frequency of the driving force and finally saturates to a fixed value for large values of the angular frequency. Using the results from the work distribution part, we next obtain the distribution of the dissipated heat for the equilibrium initial condition. Using the method of steepest descent, we obtain a Gaussian distribution for small fluctuations in the large time limit. The distribution function, for a fixed time has been obtained numerically. It is shown that the heat distribution, in general, does not satisfy the transient fluctuation theorem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑