AI 中文总结
本文探讨非平衡统计力学的三个基础问题，介绍熵产生与“狂热”在稳态驱动系统动力学涨落中的互补作用，为理解介观到宏观尺度的物理时间提供更完整起点。
AI 中文摘要
非平衡统计力学是研究多体系统在瞬态或稳态熵产生动力学条件下时间表现的科学。除了现象本身的生动多样性，其核心存在三个基础问题：第一个问题涉及熵产生的起源，熵产生赋予宏观过程方向，从而定义了时间之箭：原子力学世界如何产生耗散热、热化以及时间反演对称性破缺？第二个问题是，为何远超出平衡系统的熟悉行为，驱动或 agitation（此处保留原文术语，或可译为“扰动”）能够产生并选择稳定且功能丰富的结构：远离平衡的低熵驱动究竟凭借什么释放出自然界的丰富性与复杂性？第三个问题部分属于方法论范畴：需确定对于这类差异极大的非平衡系统的哪一子类，以及如何才能从第一性原理出发进行系统、统一的描述与建模。本文以非正式、半科普的风格探讨这些问题，既具个人参与感又涵盖广泛内容，介绍了熵产生与近年提出的、相对不为人熟知的“狂热（frenesy）”在稳态驱动系统动力学涨落中的互补作用。我们认为，二者共同为理解介观到宏观尺度的物理时间提供了更完整的起点。
英文摘要
Nonequilibrium statistical mechanics is the science of time as it manifests itself in the transient or steady entropy producing dynamical condition of many-body systems. Beyond the vivid multiformity of the phenomena themselves, three foundational issues lie at its heart. The first question concerns the very origin of entropy production, which gives macroscopic processes their direction and thereby defines the arrow of time: how does an atomistic mechanical world give rise to dissipated heat, thermalization, and time-reversal symmetry breaking? The second asks why, far beyond the familiar behavior of equilibrium systems, driving or agitation may produce and select stable and functionally rich structures: what is it about far-from-equilibrium, low-entropy driving that unleashes the wealth and intricacy of the natural world? The third issue is partly methodological: to determine how, and for which subclass of such wildly diverse nonequilibrium systems, a systematic, unified description and modeling from first principles remains possible. This essay addresses these issues in an informal, semi-popular-science style, offering a personally engaging yet wide-ranging introduction to the complementary roles of entropy production and the less familiar, more recently coined notion of frenesy in the dynamical fluctuations of steadily driven systems. Together, we argue, they provide a more complete starting point for understanding physical time on mesoscopic to macroscopic scales.
CommentsSemi-popular-science essay; about 40pages, 5 figures. Contact author if interested in publishing
