Geodesic
On the theory of the conductivity of crystals
Teoretičeskaâ i matematičeskaâ fizika, Tome 60 (1984) no. 1, pp. 107-119

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On the basis of Kubo's formula, Green's superoperators are used to calculate the electrical conductivity of crystals in the framework of perturbation theory. The proposed method does not require summation of infinite series (in the limit $\omega\rightarrow 0$). The mobility of a Frölich polaron in the case of weak coupling and of a polaron in Feynman's model is considered at low temperatures. 
@article{TMF_1984_60_1_a10,
     author = {V. F. Los'},
     title = {On the theory of the conductivity of crystals},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {107--119},
     publisher = {mathdoc},
     volume = {60},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1984_60_1_a10/}
}
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V. F. Los'. On the theory of the conductivity of crystals. Teoretičeskaâ i matematičeskaâ fizika, Tome 60 (1984) no. 1, pp. 107-119. http://geodesic.mathdoc.fr/item/TMF_1984_60_1_a10/