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arXiv 0910.0861cond-mat.stat-mechcond-mat.mes-hall
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具有内自由度的多组分系统的广义格子模型。II。准平衡态

Generalized Lattice Model of Multi-Component Systems with Internal Degrees of Freedom. II. Quasiequilibrium States

A. Yu. Zakharov, M. I. Bichurin

摘要:

本文将广义格点模型应用于具有内自由度的多组分系统。在有效场近似下,分别考虑了原子间相互作用势的短程排斥和光滑长程部分。考虑原子间势对内部自由度(如原子的电和/或磁动量)的依赖性。广义晶格模型中的Helmholtz自由能泛函被简化为Ginzburg-Landau-Cahn-Hilliard-like形式。得到了类GLCH泛函参数与原子间相互作用势特性之间的关系。导出了凝聚体系平衡态和准平衡态的方程。结果表明,由组分的冻结空间分布得到的快内自由度的平衡分布服从类薛定谔方程。

英文摘要:

The paper contains an application of the generalized lattice model to multicomponent systems with internal degrees of freedom. The short-range inter-atomic repulsions and smooth long-range parts of the inter-atomic potentials are considered separately by means of packing condition and in effective field approximation, respectively. The dependence of the inter-atomic potentials on the internal degrees of freedoms (such as atomic electric and/or magnetic momentum) taken into account. The Helmholtz free energy functional in the generalized lattice model is reduced to the Ginzburg-Landau-Cahn-Hilliard-like form. The connection between the inter-atomic potentials characteristics and the parameters of the GLCH-like functional is obtained. Equations for both equilibrium and quasi-equilibrium states in condensed systems are derived. It is shown that equilibrium distribution of the fast internal degrees of freedom by frozen space distribution of the components obeys to the Schroedinger-like equation.

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