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dc.contributor.supervisorKobes, Randy (Physics and Astronomy) Carrington, Margaret E. (Physics and Astronomy)en
dc.contributor.authorChowdhury, Usman
dc.date.accessioned2010-01-13T15:36:16Z
dc.date.available2010-01-13T15:36:16Z
dc.date.issued2010-01-13T15:36:16Z
dc.identifier.urihttp://hdl.handle.net/1993/3856
dc.description.abstractThe imaginary part of the retarded self energy is of particular interest as it contains a lot of physical information about particle interactions. In higher order loop diagrams the calculation become extremely tedious and if we have to do the same at finite temperature, it includes an extra dimension to the difficulty. In such a condition we require to switch between bases and select the best basis for a particular diagram. We have shown in our calculation that in higher order loop diagrams, at finite temperature, the R/A basis is most convenient on summing over the internal vertices and very efficient on calculating some particular diagrams while the result is most easily interpretable in the Keldysh basis for most other complex diagrams.en
dc.format.extent9287733 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoengen_US
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectQuantum Field Theoryen
dc.subjectFinite Temperatureen
dc.subjectRetarded Advanced-basisen
dc.subjectKeldysh-basisen
dc.subjectPrimary-basisen
dc.subjectcutting-rulesen
dc.subjectcirclingen
dc.subjectvertexen
dc.subjectverticesen
dc.subjectisolateden
dc.subjectislanden
dc.subjectself-energyen
dc.subjectImaginaryen
dc.subjectretardeden
dc.titleCutting rules for Feynman diagrams at finite temperature.en
dc.typeinfo:eu-repo/semantics/masterThesis
dc.typemaster thesisen_US
dc.degree.disciplinePhysics and Astronomyen_US
dc.contributor.examiningcommitteeSouthern, Byron W. (Physics and Astronomy) Schippers, Eric (Mathematics)en
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.noteFebruary 2010en


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