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arXiv 1106.3547cond-mat.stat-mechq-bio.PE
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受拉反作用锋的负速度涨落

Negative velocity fluctuations of pulled reaction fronts

Baruch Meerson, Pavel Sasorov

摘要:

由于散粒噪声,传播到不稳定状态的反应前沿的位置波动。波动锋的移动比确定性锋慢得多的概率是多少?噪音能阻止前运动一段时间,甚至使它向错误的方向运动吗?我们提出了一个WKB理论,假设在前面的区域有许多粒子,并回答了微观模型A->2A,2A->A和随机行走的这些问题。

英文摘要:

The position of a reaction front, propagating into an unstable state, fluctuates because of the shot noise. What is the probability that the fluctuating front moves considerably slower than its deterministic counterpart? Can the noise arrest the front motion for some time, or even make it move in the wrong direction? We present a WKB theory that assumes many particles in the front region and answers these questions for the microscopic model A->2A, 2A->A and random walk.

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。

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