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Green function theory of dynamic conductivity

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  • Wagh, A.S.

Abstract

The transport processes can be discussed either by kinetic equation method or by correlation function method. Using the former, linear transport equations are developed for the study of dynamic conductivity of a quantum imperfect gas employing a resolution of BBGKY hierarchy using Green functions. From this transport equation a modified form of Kubo (correlation function) formula is obtained to show the equivalence between the two methods. This equivalence may be used for the justification of the concept of adiabatic switching of the field. The simple formula derived, gives the conductivity in terms of one-particle Green function, unlike the usual discussions which express it in higher order Green functions.

Suggested Citation

  • Wagh, A.S., 1975. "Green function theory of dynamic conductivity," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 81(3), pages 369-390.
    • Handle: RePEc:eee:phsmap:v:81:y:1975:i:3:p:369-390
    DOI: 10.1016/0378-4371(75)90054-0
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