论文标题
零温度下的气液相分离：机械解释和对凝胶的影响
Gas-liquid phase separation at zero temperature: mechanical interpretation and implications for gelation
论文作者
论文摘要
几十年来，眼镜和凝胶之间的关系一直在激烈争论。但是，这两个阶段之间的过渡仍然难以捉摸。为了研究零温度极限的凝胶形成过程及其与玻璃相之间的关系，我们对静脉过静脉解压缩进行了数值实验。在减压期间，系统会经历类似于相分离的空化事件，这是零温度下的凝胶化过程。正常的模式分析表明，相位分离是通过最低特征力的消失来信号的，类似于剪切下的玻璃的塑料事件。与剪切诱导的可塑性的主要区别是，消失的模式在相位分离点的空间能量分布发生了质量变化。这些发现使我们能够根据力学定义玻璃凝胶相边界。
The relationship between glasses and gels has been intensely debated for decades; however, the transition between these two phases remains elusive. To investigate a gel formation process in the zero-temperature limit and its relation to the glass phase, we conducted numerical experiments on athermal quasistatic decompression. During decompression, the system experiences a cavitation event similar to phase separation and this is a gelation process at zero temperature. A normal mode analysis revealed that the phase separation is signaled by the vanishing of the lowest eigenenergy, similar to plastic events of glasses under shear. One primary difference from the shear-induced plasticity is that the vanishing mode experiences a qualitative change in its spatial energy distribution at the phase separation point. These findings enable us to define the glass-gel phase boundary based on mechanics.
