Title of article :
Finite-temperature retarded and advanced fields Original Research Article
Author/Authors :
H. Arthur Weldon، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1998
Abstract :
By employing retarded and advanced propagators, Aurenche and Becherrawy showed how to rewrite the real-time thermal Feynman rules so that the temperature dependence is removed from the free propagators and transferred to the vertices. The present paper introduces retarded and advanced field operators and incorporates all temperature dependence into the interaction term of the Hamiltonian. Perturbative expansions of the Green functions in the Hamiltonian formulation give the correct results order by order in perturbation theory. The spectrum of the temperature-dependent Hamiltonian contains the thermal quasiparticles that produce poles in the propagators.
Keywords :
* Thermal Green functions , * Quasiparticles
Journal title :
Nuclear Physics B
Journal title :
Nuclear Physics B