Greens function path integral representation

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Start date May 9, 2015
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Function Greens function Integral Path Path integral Representation

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aaaa202

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May 9, 2015

In my book the path integral representation of the green's function is given as that on the attached picture. But how do you go from the usual trace formula for the Green's function 2.6 to this equation?

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vanhees71

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May 9, 2015

That's a bit too lengthy an answer for a forum posting. Perhaps my lecture notes on many-body QFT help a bit:

http://fias.uni-frankfurt.de/~hees/publ/off-eq-qft.pdf

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