记忆形成中的能量和动态之间的竞争
Chloe W Lindeman1, Varda F Hagh1, Chi Ian Ip1
1Department of Physics and The James Franck and Enrico Fermi Institutes The University of Chicago, Chicago, Illinois 60637, USA.
Physical review letters
|May 27, 2023
概括
这项研究探讨了动态的歇斯顿子,在无序的材料中模拟记忆. 我们发现,强迫时间尺度和振荡显著影响系统行为,导致路径依赖的捕获,而不是仅仅局部能量最小值.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 复杂的系统复杂的系统.
背景情况:
- 双晶体系统被模拟为hysterons,以理解无序材料中的记忆.
- 通常在准静态条件下分析hysterons,忽略动态效应.
研究的目的:
- 通过在可调节的双可调弹系统中探索动态效应来概括hysterons.
- 调查系统动态如何影响能源最小值的选择.
主要方法:
- 使用可调节的双可调弹系统开发了一个通用化的hysteron模型.
- 在不同的强迫时间尺度和振荡强迫下研究系统行为.
主要成果:
- 通过强制时间表控制的系统动态,决定了遵循局部能量最小值和依赖路径的捕获之间的过渡.
- 振荡强迫可以诱导持久的瞬态,这种现象在准静态歇斯顿中不存在.
结论:
- 动态效应对于理解超越准静态近似的歇斯顿行为至关重要.
- 强迫时间尺度和振荡的相互作用引入了复杂的记忆行为在可比式系统.
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