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arXiv 1004.3526cond-mat.stat-mechcond-mat.soft
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动态玻璃化转变:弥合模式耦合理论和复制方法之间的差距

Dynamic glass transition: bridging the gap between mode-coupling theory and the replica approach

Grzegorz Szamel

摘要:

我们澄清了由模式耦合理论预测的遍历性破缺跃迁和由静态复制方法预测的所谓动态跃迁之间的关系。继弗兰兹和帕里西[物理。79,2486(1997)]中,我们考虑了一个质点系,它处于一个亚稳态,其特征是与一个猝灭组态有非平凡的关联。我们表明,在亚稳态粒子电流消失的假设导致副本非对角直接关联函数的副本非对角静态四点关联函数的表达式。该函数的因式分解近似导致副本非对角直接关联函数的近似闭合。副本非对角Ornstein-Zernicke方程与此封闭相结合,符合方程的非遍历性参数导出使用模式耦合理论。

英文摘要:

We clarify the relation between the ergodicity breaking transition predicted by mode-coupling theory and the so-called dynamic transition predicted by the static replica approach. Following Franz and Parisi [Phys. Rev. Lett. 79, 2486 (1997)], we consider a system of particles in a metastable state characterized by non-trivial correlations with a quenched configuration. We show that the assumption that in a metastable state particle currents vanish leads to an expression for the replica off-diagonal direct correlation function in terms of a replica off-diagonal static four-point correlation function. A factorization approximation for this function results in an approximate closure for the replica off-diagonal direct correlation function. The replica off-diagonal Ornstein-Zernicke equation combined with this closure coincides with the equation for the non-ergodicity parameter derived using the mode-coupling theory.

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