A Deduced Feynman Rule for Calculating Retarded and Advanced Green Function in Closed Time Path Formalism

XIAO Jun; CHENG Luan; WANG En-Ke

Chinese Physics C> 2004, Vol. 28> Issue(7) : 690-695

A Deduced Feynman Rule for Calculating Retarded and Advanced Green Function in Closed Time Path Formalism

Institute of Particle Physics,Huazhong Normal University,Wuhan 430079,China

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Abstract：
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 φ³ theory. The generalized fluctuation-dissipation theorem for three-point nonlinear response function is verified.

References

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XIAO Jun, CHENG Luan and WANG En-Ke. A Deduced Feynman Rule for Calculating Retarded and Advanced Green Function in Closed Time Path Formalism[J]. Chinese Physics C, 2004, 28(7): 690-695.

XIAO Jun, CHENG Luan and WANG En-Ke. A Deduced Feynman Rule for Calculating Retarded and Advanced Green Function in Closed Time Path Formalism[J]. Chinese Physics C, 2004, 28(7): 690-695. shu

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Received: 2003-07-18
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

A Deduced Feynman Rule for Calculating Retarded and Advanced Green Function in Closed Time Path Formalism

Corresponding author: WANG En-Ke,

Institute of Particle Physics,Huazhong Normal University,Wuhan 430079,China

Received Date: 2003-07-18
Accepted Date: 1900-01-01
Available Online: 2004-07-05

Abstract: 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 φ³ theory. The generalized fluctuation-dissipation theorem for three-point nonlinear response function is verified.