Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/98459
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Polaron variational methods in the particle representation of field theory: II. Numerical results for the propagator |
Author: | Rosenfelder, R. Schreiber, A.W. |
Citation: | Physical Review D: Particles, Fields, Gravitation and Cosmology, 1996; 53(6):3354-3365 |
Publisher: | American Physical Society |
Issue Date: | 1996 |
ISSN: | 0556-2821 1089-4918 |
Statement of Responsibility: | R. Rosenfelder and A. W. Schreiber |
Abstract: | For the scalar Wick-Cutkosky model in the particle representation we perform a similar variational calculation for the two-point function as was done by Feynman for the polaron problem. We employ a quadratic nonlocal trial action with a retardation function for which several Ansätze are used. The variational parameters are determined by minimizing the variational function and in the most general case the nonlinear variational equations are solved numerically. We obtain the residue at the pole, study analytically and numerically the instability of the model at larger coupling constants, and calculate the width of the dressed particle. |
Rights: | © 1996 The American Physical Society. |
DOI: | 10.1103/PhysRevD.53.3354 |
Published version: | http://dx.doi.org/10.1103/physrevd.53.3354 |
Appears in Collections: | Aurora harvest 3 Physics publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
hdl_98459.pdf | Published version | 823.49 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.