On a new self-consistent-field theory for the canonical ensemble
Abstract
A significant amount of many-body problems of quantum or classical equilibrium statistical mechanics are conveniently treated at fixed temperature and system size. In this paper, we present a new functional integral approach for solving canonical ensemble problems over the entire coupling range, relying on the method of Gaussian equivalent representation of Efimov and Ganbold [Phys. Status Solidi 168, 165 (1991)]. We demonstrate its suitability and competitiveness for performing approximate calculations of thermodynamic and structural quantities on the example of a repulsive potential model, widely used in soft matter theory.
- Publication:
-
Journal of Chemical Physics
- Pub Date:
- June 2006
- DOI:
- 10.1063/1.2204913
- Bibcode:
- 2006JChPh.124v4110B
- Keywords:
-
- 05.20.-y;
- 05.70.-a;
- 65.60.+a;
- 02.30.Rz;
- Classical statistical mechanics;
- Thermodynamics;
- Thermal properties of amorphous solids and glasses: heat capacity thermal expansion etc.;
- Integral equations