arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1812.02462cond-mat.stat-mech
收藏

活性反应扩散系统中反应前沿的渐近速度

The asymptotic speed of reaction fronts in active reaction-diffusion systems

Thibaut Demaerel, Christian Maes

摘要:

我们研究各种组合的积极扩散与分支,作为标准的反应扩散过程的扩展。我们集中在一般空间维度的热运行和翻滚和热激活布朗过程的渐近波前速度的选择。比较一维主动分支过程和被动分支过程(具有相同的有效扩散常数和再生率),我们发现主动分支过程的传播速度要小一些。在更高的维度中,类似的比较会得出相反的结论。

英文摘要:

We study various combinations of active diffusion with branching, as an extension of standard reaction-diffusion processes. We concentrate on the selection of the asymptotic wavefront speed for thermal run-and-tumble and for thermal active Brownian processes in general spatial dimensions. Comparing 1D active branching processes with a passive counterpart (which has the same effective diffusion constant and reproduction rate), we find that the active process has a smaller propagation speed. In higher dimensions, a similar comparison yields the opposite conclusion.

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。

↑