2020/06/08 by B. A. Fayzullaev, Fayzullaev, B. A., E. Qayumov +1
Mathematics · Physics and Astronomy · #81Q30 (Primary) 81Q15 (Secondary) #Algebraic structures and combinatorial models #B.7 #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2006.04908
openalex publication_date 2020/06/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Schwinger-Dyson equations connecting free and full Green functions and vertex parts widely were used in QED for finding full Green functions under different conditions. Undoubtedly, the same approach should leads to derivation of many useful information about other models of QFT. In this work we present some technique based on variational equations for effective action to derive many different Schwinger-Dyson type equations in QFT models such as nonlinear sigma model and scalar field theory.