Perturbation theory
Keyword(s):
This chapter provides a general description of perturbation theory in terms of Feynman diagrams. The general prescriptions of constructing Feynman diagrams in momentum space are given, including for an S-matrix. The connected Green functions and the corresponding generation functional are defined with full proofs. After introducing effective action, the chapter addresses loop expansion. The chapter ends with a discussion of Feynman diagrams in fermionic theory.
1973 ◽
Vol 6
(1)
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pp. 1-7
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2005 ◽
Vol 40
(2)
◽
pp. 275-286
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1970 ◽
Vol 3
(7)
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pp. 1462-1482
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Keyword(s):
2019 ◽
Vol 35
(01)
◽
pp. 1950346
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2001 ◽
Vol 219
(1)
◽
pp. 5-30
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1993 ◽
Vol 08
(02)
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pp. 277-300
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Keyword(s):
1985 ◽
Vol 54
(12)
◽
pp. 1222-1225
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1973 ◽
Vol 6
(1)
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pp. 9-16
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