Abstract

A spin chain model with mean-field interactions is studied within the microcanonical ensemble. Under local microcanonical dynamics, gaps in the space of extensive variables can be open up leading to the ergodicity breaking of this system. As a consequence, our mean-field system can exhibit the zero-order phase transition accompanied with an entropy jump at the transition point. Moreover, the global phase diagram of the system is constructed.

GraphicAbstract

中文翻译：

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平均场系统中遍历性破坏引起的零阶相变

摘要

在微经典集合中研究了具有均值场相互作用的自旋链模型。在局部微规范动力学的作用下，广泛变量空间中的缺口会被打开，从而导致该系统的遍历性破坏。结果，我们的平均场系统可以表现出零阶相变，并在过渡点处出现熵跳变。此外，构建了系统的全局相位图。

图形摘要