短程润湿II非局域界面哈密顿量的推导:一般图解结构
Derivation of a Non-Local Interfacial Hamiltonian for Short-Ranged Wetting II: General Diagrammatic Structure
摘要:
在我们的第一篇论文中,我们展示了如何从一个潜在的Landau-Ginzburg-Wilson模型中推导出一个非局部有效的短期润湿哈密顿量。在这里,我们结合格林函数方法与标准微扰理论,以确定一般的图形形式的结合势的功能超出双抛物线近似的朗道-金兹伯格-威尔逊体势。三次和四次相互作用的主要影响是简单地改变双抛物线状之字形图的系数,并引入曲率和管相互作用修正(也用图解表示),这是次要的。非定域性产生了有效的长程多体界面相互作用,由于反射的管状波动从壁。替代壁边界条件(与表面场和增强)和图解描述的三临界润湿进行了讨论。
英文摘要:
In our first paper, we showed how a non-local effective Hamiltionian for short-ranged wetting may be derived from an underlying Landau-Ginzburg-Wilson model. Here, we combine the Green's function method with standard perturbation theory to determine the general diagrammatic form of the binding potential functional beyond the double-parabola approximation for the Landau-Ginzburg-Wilson bulk potential. The main influence of cubic and quartic interactions is simply to alter the coefficients of the double parabola-like zig-zag diagrams and also to introduce curvature and tube-interaction corrections (also represented diagrammatically), which are of minor importance. Non-locality generates effective long-ranged many-body interfacial interactions due to the reflection of tube-like fluctuations from the wall. Alternative wall boundary conditions (with a surface field and enhancement) and the diagrammatic description of tricritical wetting are also discussed.
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