Phys. Rev. 131, 2345–2349 (1963)Perturbation-Theory Rules for Computing the Self-Energy Operator in Quantum Statistical MechanicsReceived 19 April 1963; published in the issue dated September 1963 Convenient rules are given for the general term in the time-independent perturbation-theory expansion for the self-energy operator of quantum statistical mechanics. The rules are derived by starting from the usual formalism involving time-dependent Green's functions. © 1963 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRev.131.2345
DOI:
10.1103/PhysRev.131.2345
PACS:
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