中文

多分散系统的构型熵不可能达到零

统计力学 2021-03-01 v2 软凝聚态物质

摘要

我们给出这样一些系统的例子:其构型熵SconfS_{\text{conf}}不可能达到零,而是受相应理想气体的混合熵SmixS_{\text{mix}}从下方限制。我们使用通过势能地形局域极小值定义的SconfS_{\text{conf}},即SconfPELS_{\text{conf}}^{\text{PEL}}。我们表明这发生在平均场模型、具有无穷小多分散性的硬球集合以及一维硬棒中。我们证明这些结果与近期在自由能地形中定义的构型熵SconfFELS_{\text{conf}}^{\text{FEL}}的理解进展相符。我们证明若min(SconfFEL)=0\min( S_{\text{conf}}^{\text{FEL}} ) = 0,则对于任意系统有min(SconfPEL)=AN+Smix\min( S_{\text{conf}}^{\text{PEL}} ) = A N + S_{\text{mix}},其中NN为粒子数,AA为由相互作用势决定的某个常数。我们讨论了这些结果对Adam–Gibbs (AG)关系和RFOT关系有何启示,并表明后者对两种构型熵SconfFELS_{\text{conf}}^{\text{FEL}}SconfPELS_{\text{conf}}^{\text{PEL}}均保持物理上有意义的形式。

关键词

引用

@article{arxiv.1809.02219,
  title  = {Configurational entropy of polydisperse systems can never reach zero},
  author = {Vasili Baranau and Ulrich Tallarek},
  journal= {arXiv preprint arXiv:1809.02219},
  year   = {2021}
}

备注

The paper is not scientifically sound and makes several unjustified assumptions. The examples that are sound are unfortunately almost trivial. We did not find a reasonable way to fix or alleviate these problems. These deficiencies were pointed out by several independent reviewers during a peer-review process