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A measure of conductivity for lattice fermions at finite density

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arxiv cond-mat/9905079 v2 pith:ZUHTWQV6 submitted 1999-05-06 cond-mat hep-lat

A measure of conductivity for lattice fermions at finite density

J. L. Alonso , L. A. Fernandez , V. Martin-Mayor This is my paper
classification cond-mat hep-lat
keywords fermionsanalyticalconductivitylatticemeasureallowsapproachcalculation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the linear response to an external electric field of a system of fermions in a lattice at zero temperature. This allows to measure numerically the Euclidean conductivity which turns out to be compatible with an analytical calculation for free fermions. The numerical method is generalizable to systems with dynamical interactions where no analytical approach is possible.

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