Is a "homogeneous" description of dynamic heterogeneities possible?
نویسنده
چکیده
We study the simplest model of dynamic heterogeneities in glass forming liquids: one-spin facilitated kinetic Ising model introduced by Fredrickson and Andersen [G. H. Fredrickson and H. C. Andersen, Phys. Rev. Lett. 53, 1244 (1984); J. Chem. Phys. 83, 5822 (1985)]. We show that the low-temperature, long-time behavior of the density autocorrelation function predicted by a scaling approach can be obtained from a self-consistent mode-couplinglike approximation.
منابع مشابه
0 Ju l 2 00 4 Is a “ homogeneous ” description of dynamic heterogeneities possible ?
We study the simplest model of dynamic heterogeneities in glass forming liquids: one-spin facilitated kinetic Ising model introduced by Fredrickson and Andersen [G.H. Fredrickson and H.C. Andersen, Phys. Rev. Lett. 53, 1244 (1984); J. Chem. Phys. 83, 5822 (1985)]. We show that the low-temperature, long-time behavior of the density autocorrelation function predicted by a scaling approach can be ...
متن کاملDynamic heterogeneities in the out-of-equilibrium dynamics of simple spherical spin models.
The response of spherical two-spin interaction models, the spherical ferromagnet (s-FM) and the spherical Sherrington-Kirkpatrick (s-SK) model, is calculated for the protocol of the so-called nonresonant hole burning (NHB) experiment for temperatures below the respective critical temperatures. It is shown that it is possible to select dynamic features in the out-of-equilibrium dynamics of both ...
متن کاملOn new phenomena in dynamic promotional competition models with homogeneous and quasi-homogeneous rms
In this paper we study a class of dynamic promotional competition models, in which rms compete for market share by expending marketing e¤ort. We investigate two main issues. First, we answer the question if it is possible to give a global characterization of the stability of the steady state e¤ort allocation. We show that by using the concept of critical curves and an invariance property of th...
متن کاملHeterogeneous structure of poly„vinyl chloride... as the origin of anomalous dynamical behavior
We have investigated the thermal evolution of the structure and the dynamics of poly~vinyl chloride! ~PVC! in a wide temperature range. Corroborating earlier findings, small angle neutron scattering revealed the presence of structural heterogeneities. On the other hand, the single chain form factor corresponds to that of Gaussian chains. Gradually with increasing temperature the system becomes ...
متن کاملTemporal and structural heterogeneities emerging in adaptive temporal networks
We introduce a model of adaptive temporal networks whose evolution is regulated by an interplay between node activity and dynamic exchange of information through links. We study the model by using a master equation approach. Starting from a homogeneous initial configuration, we show that temporal and structural heterogeneities, characteristic of real-world networks, spontaneously emerge. This t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- The Journal of chemical physics
دوره 121 8 شماره
صفحات -
تاریخ انتشار 2004