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Remarks on Luttinger's Derivation of Kubo's Conductivity Formula
Author(s) -
Lee M. H.
Publication year - 1999
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150390135
Subject(s) - kubo formula , generalization , conductivity , physics , luttinger liquid , einstein relation , basis (linear algebra) , relation (database) , series (stratigraphy) , quantum mechanics , mathematical physics , theoretical physics , mathematics , mathematical analysis , quantum , computer science , paleontology , geometry , biology , metric (unit) , operations management , database , economics
Luttinger has given a derivation of Kubo's static conductivity formula in a famous paper some thirty years ago. In a subsequent analysis to obtain the Einstein relation, he introduced an assumption. We show that this assumption is not consistent with linear response theory, on the basis of which the conductivity formula is derived. This inconsistency can be removed. At the same time, one can extend Luttinger's treatment to include the dynamic conductivity. This generalization is allowed by the recurrence relations method, which solves the Heisenberg equation of motion formally as well as explicitly.