混乱对对称的简单排除过程中的当前波动产生意想不到的影响
1Department of Physics and Astronomy, Tokyo University of Science, Noda, Chiba 278-8510, Japan.
Physical review. E
|February 20, 2025
概括
不同质的环境中的乱显著改变了对称简单排除过程 (SSEP) 中的当前波动. 我们发现不对称的密度依赖和低密度区域的波动增加,为许多粒子系统提供了洞察力.
科学领域:
- 统计力学 统计力学
- 多体物理多体物理
- 复杂的系统复杂的系统.
背景情况:
- 对称简单排除过程 (SSEP) 是粒子运输的一个基本模型.
- 了解当前波动对于分析系统动态和新出现的行为至关重要.
- 环境中的异质性可以导致对运输现象的复杂,非微不足道的影响.
研究的目的:
- 调查环境混乱对SSEP当前波动的影响.
- 在异质的SSEP模型中导出和分析电流的第二时刻.
- 为控制相互作用的多粒子系统中的电流波动提供见解.
主要方法:
- 在周期边界条件下,对SSEP具有缺陷位置的电流的第二时刻的准确导出.
- 应用部分平均场方法,以在灭的随机能量场景上近似测定SSEP中电流的第二时刻.
- 与同质的SSEP系统进行比较分析.
主要成果:
- 电流的第二时刻偏离了SSEP同质的行为.
- 对电流的第二时刻的不对称密度依赖性观察到密度为1/2.2左右.
- 电流的第二时刻在低密度区域中超过了同质系统值.
- 能源格局显著影响当前的波动,突出环境和系统之间的相互作用.
结论:
- 环境异质性引入了对SSEP当前波动的重大修改.
- 衍生出来的表达式和观察到的现象提供了对无序运输的更深入的理解.
- 这些发现对控制各种相互作用的多粒子系统中的粒子运输有影响,包括生物环境.
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