Dyre Jeppe C
Glass and time--Danish National Research Foundation Centre for Viscous Liquid Dynamics, Department of Mathematics and Physics (IMFUFA), Roskilde University.
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jul;72(1 Pt 1):011501. doi: 10.1103/PhysRevE.72.011501. Epub 2005 Jul 5.
It is suggested that the omega(-1/2) high-frequency decay of the alpha loss in highly viscous liquids, which appears to be generic, is a manifestation of a negative long-time tail as typically encountered in stochastic dynamics. The proposed mechanism requires that the coherent diffusion constant is much larger than estimated from the alpha relaxation time. This is justified by reference to the solidity of viscous liquids in an argument which, by utilizing the irrelevance of momentum conservation at high viscosity and introducing a center of mass diffusion constant, implies that at high viscosity the coherent diffusion constant is much larger than the incoherent diffusion constant.
有人认为，高粘性液体中α弛豫损失的ω（-1/2）高频衰减似乎是普遍存在的，它是随机动力学中典型出现的负长时间尾部的一种表现。所提出的机制要求相干扩散常数比根据α弛豫时间估计的要大得多。这通过在一个论证中提及粘性液体的坚固性来证明，该论证利用了高粘度下动量守恒的无关性并引入了质心扩散常数，这意味着在高粘度下相干扩散常数远大于非相干扩散常数。
