%0 Journal Article
%A Alonso, J. L.
%A Fernández Pérez, Luis Antonio
%A Martín Mayor, Víctor
%T A measure of conductivity for lattice fermions at finite density
%D 2000
%@ 0370-2693
%U https://hdl.handle.net/20.500.14352/60067
%X 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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