Laboratoire PMCN, Université Lyon 1, UMR CNRS 5586, 69622 Villeurbanne, France.
Phys Rev Lett. 2010 Apr 23;104(16):165701. doi: 10.1103/PhysRevLett.104.165701. Epub 2010 Apr 21.
We numerically produce fully amorphous assemblies of frictionless spheres in three dimensions and study the jamming transition these packings undergo at large volume fractions. We specify four protocols yielding a critical value for the jamming volume fraction which is sharply defined in the limit of large system size, but is different for each protocol. Thus, we directly establish the existence of a continuous range of volume fractions where nonequilibrium jamming transitions occur. However, these jamming transitions share the same critical behavior. Our results suggest that, even in the absence of partial crystalline ordering, a unique location of a random close packing does not exist.
我们在三维空间中数值生成完全无摩擦球体的非晶组装体，并研究这些组装体在大体积分数下经历的阻塞转变。我们指定了四种方案，得到了一个阻塞体积分数的临界值，该值在大系统尺寸的极限下定义得非常明确，但对于每种方案都不同。因此，我们直接证明了在不存在非平衡阻塞转变的情况下，存在一个连续的体积分数范围。然而，这些阻塞转变具有相同的临界行为。我们的结果表明，即使没有部分结晶有序，随机密堆积的位置也不存在独特性。
