A deduced Feynman rule for calculating retarded and advanced green function in closed time path formalism

作者：Xiao J^*; Cheng L; Wang EK

来源：Chinese Physics C, 2004, 28(7): 690-695.

• thermal field theory
• Feynman rule
• retarded Green function
• advanced Green function

Based on the closed time path formalism, a deduced Feynman rule for directly calculating the retarded and advanced Green functions is given. This Feynman rule is used to calculate the two-point self-energy and three-point vertex correction in phi(3) theory. The generalized fluctuation-dissipation theorem for three-point nonlinear response function is verified.

• 出版日期2004-7
• 单位华中师范大学