Parallelizing the Keldysh formalism for strongly correlated electrons

Details Parallelizing the Keldysh formalism for strongly correlated electrons Parallelizing the Keldysh formalism for strongly correlated electrons

2004-07-15

arxiv.org/abs/cond-mat/0407413v1

in Proceedings of the HPCMP Users Group Conference 2004, Williamsburg, VA, June 7--11, 2004 edited by R. E. Peterkin (IEEE Com

Physics

Condensed Matter

Strongly Correlated Electrons

(8 pages, 9 figures, conference proceeding for the 2004 HPMC User's group conference)

Scientific paper

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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