Charbonneau Patrick, Morse Peter K
Department of Chemistry, Duke University, Durham, North Carolina 27708, USA.
Department of Physics, Duke University, Durham, North Carolina 27708, USA.
Phys Rev Lett. 2021 Feb 26;126(8):088001. doi: 10.1103/PhysRevLett.126.088001.
Liquids equilibrated below an onset condition share similar inherent states, while those above that onset have inherent states that markedly differ. Although this type of materials memory was first reported in simulations over 20 years ago, its physical origin remains controversial. Its absence from mean-field descriptions, in particular, has long cast doubt on its thermodynamic relevance. Motivated by a recent theoretical proposal, we reassess the onset phenomenology in simulations using a fast hard sphere jamming algorithm and find it to be both thermodynamically and dimensionally robust. Remarkably, we also uncover a second type of memory associated with a Gardner-like regime of the jamming algorithm.
在起始条件以下达到平衡的液体具有相似的固有状态，而在该起始条件以上的液体则具有明显不同的固有状态。尽管这种材料记忆类型早在20多年前的模拟中就首次被报道，但其物理起源仍存在争议。特别是，它在平均场描述中不存在，长期以来一直让人怀疑其热力学相关性。受最近一项理论提议的启发，我们使用快速硬球堵塞算法在模拟中重新评估起始现象学，发现它在热力学和维度上都是稳健的。值得注意的是，我们还发现了与堵塞算法的类加德纳区域相关的第二种记忆类型。
