Domain walls in nonequilibrium systems and the emergence of persistent patterns.

Domain walls in nonequilibrium systems and the emergence of persistent patterns.
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非平衡系统中的畴壁和持久模式的出现。

DOI:
10.1103/physreve.48.705
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发表时间:
1993
期刊:
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子:
--
通讯作者:
E. Meron
E. Meron
中科院分区:
--
文献类型:
--
作者:
A. Hagberg;E. Meron

文献摘要

被引文献

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平衡相变中的畴壁沿优选方向传播,以最小化系统的自由能。结果,最初的时空模式最终衰减到均匀状态。由于不存在远离平衡的变分原理,因此可以在任何方向上传播的磁畴壁共存。因此,可能会出现“持久”模式。我们使用朗道二阶相变模型的非变分扩展来研究这种模式形成机制。 PACS 编号:05.70.Fh、42.65.Pc、47.20.Ky、82.20Mj
Domain walls in equilibrium phase transitions propagate in a preferred direction so as to minimize the free energy of the system. As a result, initial spatio-temporal patterns ultimately decay toward uniform states. The absence of a variational principle far from equilibrium allows the coexistence of domain walls propagating in any direction. As a consequence, *persistent* patterns may emerge. We study this mechanism of pattern formation using a non-variational extension of Landau's model for second order phase transitions. PACS numbers: 05.70.Fh, 42.65.Pc, 47.20.Ky, 82.20Mj