•Thomas Ludwig^1,2, Alexander Mirlin^1,2 und Yaroslav Blanter^3
1Institut für Nanotechnologie, Forschungszentrum Karlsruhe, 76021 Karlsruhe, Germany
²Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, 76128 Karlsruhe, Germany
³Department of NanoScience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands

We investigate the amplitude of mesoscopic fluctuations of the differential conductance of a metallic wire at arbitrary bias voltage. We identify the parameter regime where inelastic scattering is important. In the noninteracting case we show quantitative results for T = 0, in the interacting case we qualitatively identify the asymptotic behaviour. We show that, due to inelastic scattering, conductance fluctuations cannot grow with increasing voltage in a way that would lead to negative differential resistance.