Grozdanov, SašoLucas, Andrew JamesSachdev, SubirSchalm, Koenraad2017-02-172015Grozdanov, Sašo, Andrew Lucas, Subir Sachdev, and Koenraad Schalm. 2015. Absence of Disorder-Driven Metal-Insulator Transitions in Simple Holographic Models. Physical Review Letters 115, no. 22. doi:10.1103/physrevlett.115.221601.0031-9007http://nrs.harvard.edu/urn-3:HUL.InstRepos:30367427We study electrical transport in a strongly coupled strange metal in two spatial dimensions at finite temperature and charge density, holographically dual to the Einstein-Maxwell theory in an asymptotically four-dimensional anti–de Sitter space spacetime, with arbitrary spatial inhomogeneity, up to mild assumptions including emergent isotropy. In condensed matter, these are candidate models for exotic strange metals without long-lived quasiparticles. We prove that the electrical conductivity is bounded from below by a universal minimal conductance: the quantum critical conductivity of a clean, charge-neutral plasma. Beyond nonperturbatively justifying mean-field approximations to disorder, our work demonstrates the practicality of new hydrodynamic insight into holographic transport.en-USJournal Article2017-02-1710.1103/PhysRevLett.115.221601