Equations for two-temperature Green's functions for a~Heisenberg
Teoretičeskaâ i matematičeskaâ fizika, Tome 154 (2008) no. 1, pp. 197-206

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We use the mode-coupling approximation to derive a closed system of equations for the Green's functions for the transverse and longitudinal spin components taking the sum rules related to the finiteness of the spin into account exactly.
Keywords: mode-coupling approximation, sum rules for spin operators.
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     author = {Yu. A. Tserkovnikov},
     title = {Equations for two-temperature {Green's} functions for {a~Heisenberg}},
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Yu. A. Tserkovnikov. Equations for two-temperature Green's functions for a~Heisenberg. Teoretičeskaâ i matematičeskaâ fizika, Tome 154 (2008) no. 1, pp. 197-206. http://geodesic.mathdoc.fr/item/TMF_2008_154_1_a12/