Statistical field theory for simple fluids: The collective variables representation

被引：28
作者：
Caillol, J. -M.
Patsahan, O.
Mryglod, I.
机构：
[1] Natl Acad Sci Ukraine, Inst Condensed Matter Phys, UA-79011 Lvov, Ukraine
[2] Univ Paris 11, Lab Phys Theor, CNRS, UMR 8627, F-91405 Orsay, France
来源：
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2006年 / 368卷 / 02期
关键词：
statistical field theory; loop expansion; collective variables;
D O I：
10.1016/j.physa.2005.11.010
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
An alternative representation of an exact statistical field theory for simple fluids, based on the method of collective variables, is presented. The results obtained are examined from the point of another version of theory that was developed recently by performing a Hubbard-Stratonovich transformation of the configurational Boltzmann factor [J.-M. Caillol, Mol. Phys. 101 (2003) 1617]. The analytical expressions for the pressure and the free energy are derived in two-loop approximation for both versions of theory and it is shown that they are indeed equivalent. The results yield a new type approximation within an untested approximation scheme. (c) 2005 Elsevier B.V. All rights reserved.
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页码：326 / 344
页数：19
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