n-point functions at finite temperature

Abstract

We study $n$-point functions at finite temperature in the closed time path formalism. With the help of two basic column vectors and their dual partners we derive a compact decomposition of the time-ordered $n$-point functions with $2^n$ components in terms of $2^{n-1}-1$ independent retarded/advanced $n$-point functions. This representation greatly simplifies calculations in the real-time formalism.

Revtex, 14pages, no figure

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