Open AccessOn the loop expansion of the effective action
Author(s) -
Trân Hũu Phát,
Nguyễn Văn Long
Publication year - 2007
Publication title -
communications in physics/communications in physics
Language(s) - English
Resource type - Journals
eISSN - 2815-5947
pISSN - 0868-3166
DOI - 10.15625/0868-3166/14/2/10696
Subject(s) - action (physics) , loop (graph theory) , effective action , physics , point (geometry) , asymptotic expansion , mathematics , mathematical physics , mathematical analysis , quantum mechanics , geometry , combinatorics
Based on the DeWitt formula the loop expansion of the effective action is easily established. Extending to the system with finite density we develop the in-medium DeWitt formula, which is the starting point for setting up loop expansion of the in-medium effective action.