Alternative dimensional reduction via the density matrix: A test
نویسندگان
چکیده
We derive and analyze the perturbation series for the classical effective potential in quantum statistical mechanics, treated as a toy model for the dimensionally reduced effective action in quantum field theory at finite temperature. The first few terms of the series are computed for the harmonic oscillator and the quartic potential.
منابع مشابه
Alternative Dimensional Reduction via the Density Matrix
We give graphical rules, based on earlier work for the functional Schrödinger equation, for constructing the density matrix for scalar and gauge fields in equilibrium at finite temperature T . More useful is a dimensionally-reduced effective action (DREA) constructed from the density matrix by further functional integration over the arguments of the density matrix coupled to a source. The DREA ...
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