Binary collision expansion and partial green's functions of Kadanoff-Baym

T. Nishigori

Physica A: Statistical Mechanics and its Applications, 1975, vol. 83, issue 1, 178-192

Abstract: A new formula for the binary collision expansion of the unitary operator U (t2, t1) is proposed. The formula is applied to the expansion of the partial Green's functions of Kadanoff-Baym in powers of the correct binary scattering amplitude. It is shown that certain linked diagrams of left-multidentate structure should be taken into account. The duration of the binary collision is seen to play an important role in the rigorous formulation. Upon neglecting this duration, a useful approximation is found for the analysis of correlations on a macroscopic time scale.

Date: 1975
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:83:y:1975:i:1:p:178-192

DOI: 10.1016/0378-4371(76)90142-4

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