Lambert, Colin and Hagston, W. E. (1981) Renormalised perturbation theory of normal systems. Journal of Physics A: Mathematical and General, 14 (7). pp. 1533-1542. ISSN 0305-4470
Full text not available from this repository.Abstract
Employing an infinite hierarchy of equations for the Green functions of a many particle system in its ground state mod psi N), the well known non-relativistic, time-dependent, ground-state perturbation theory of a normal system of interacting fermions is derived, without introducing the hypothesis that mod psi N) is the adiabatic transform of a non-interacting state. This new formulation of the problem allows us to renormalise conventional perturbation theory by introducing an effective interaction Gamma and the final result is a highly summed and manifestly self-consistent perturbation expansion in powers of Gamma . The authors calculate Gamma to second order and demonstrate that many of the well known results of time-dependent perturbation theory may be obtained by choosing the simplest approximations for Gamma . The results are readily generalised to finite temperatures and the formalism provides a generalised form of Hartree-Fock theory which may have important applications in many areas of physics.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Journal of Physics A: Mathematical and General |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 58063 |
| Deposited By: | ep_importer_pure |
| Deposited On: | 22 Oct 2012 11:58 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 22 Oct 2012 11:58 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/58063 |
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