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Parallelizing the Keldysh formalism for strongly correlated electrons

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arxiv cond-mat/0407413 v1 pith:X6ADBRSO submitted 2004-07-15 cond-mat.str-el

Parallelizing the Keldysh formalism for strongly correlated electrons

J. K. Freericks (Georgetown) , V. Turkowski (Georgetown) , V. Zlatic (Inst. of Physics , Zagreb , Croatia) This is my paper
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keywords keldyshcorrelatedevolvesfieldformalismfunctionnonequilibriumquantum
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Nonequilibrium quantum mechanics can be solved with the Keldysh formalism, which evolves the quantum mechanical states forward in time in the presence of a time-dependent field, and then evolves them backward in time, undoing the effect of the time-dependent field. The Feynman path integral over the Keldysh contour is employed to calculate the strongly correlated Green's function. We examine the accuracy of this procedure for the simplest problem that requires a nonequilibrium formulation: the f-electron spectral function of the spinless Falicov-Kimball model.

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