Abstract
Using the functional integral formalism for the statistical generating functional in the statistical (finite temperature) quantum field theory, we prove the equivalence of many-photon Green's functions in the Duffin–Kemmer–Petiau and Klein–Gordon–Fock statistical quantum field theories. As an illustration, we calculate the one-loop polarization operators in both theories and demonstrate their coincidence.
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Valverde, J.S., Pimentel, B.M. & Fainberg, V.Y. Equivalence of Many-Photon Green's Functions in the Duffin–Kemmer–Petiau and Klein–Gordon–Fock Statistical Quantum Field Theories. Theoretical and Mathematical Physics 140, 931–938 (2004). https://doi.org/10.1023/B:TAMP.0000033030.16839.ba
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DOI: https://doi.org/10.1023/B:TAMP.0000033030.16839.ba