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arXiv 0812.0498cond-mat.stat-mech
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两态主方程中轨线的统计特性

Statistics of trajectories in two-state master equations

Andrew D. Jackson, Simone Pigolotti

摘要:

我们推导出一个主方程的轨迹概率的简单表达式。该表达式是特别有用的,当状态的数量是小的,并允许计算的可观测量,可以被定义为整个轨迹的泛函。我们用两态主方程来说明该方法,为此我们计算了在一个状态下花费的时间分布和每个给定时间间隔内的跃迁数量分布。这两个表达式是根据修正的贝塞尔函数解析得到的。

英文摘要:

We derive a simple expression for the probability of trajectories of a master equation. The expression is particularly useful when the number of states is small and permits the calculation of observables that can be defined as functionals of whole trajectories. We illustrate the method with a two-state master equation, for which we calculate the distribution of the time spent in one state and the distribution of the number of transitions, each in a given time interval. These two expressions are obtained analytically in terms of modified Bessel functions.

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