%0 Journal Article
%A Karevski, D.
%A Schütz, G. M.
%T Conformal Invariance in Driven Diffusive Systems at High Currents
%J Physical review letters
%V 118
%N 3
%@ 1079-7114
%C College Park, Md.
%I APS
%M FZJ-2018-00123
%P 030601
%D 2017
%X We consider space-time correlations in driven diffusive systems which undergo a fluctuation into a regime with an atypically large current or dynamical activity. For a single conserved mass we show that the spatiotemporal density correlations in one space dimension are fully determined by conformal field theory with central charge c=1, corresponding to a ballistic universality class with dynamical exponent z=1. The full phase diagram for general atypical behavior exhibits the conformally invariant regime and, for atypically low current or activity, a region of phase separation. The phase transition line between these two regimes corresponds to typical behavior and the dynamics belongs to the Kardar-Parisi-Zhang universality class with dynamical exponent z=3/2, except for a diffusive point with z=2. The exact universal dynamical structure function is obtained in explicit form from the one-dimensional asymmetric simple exclusion process with periodic and open boundaries in the limit of maximal current.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:28157348
%U <Go to ISI:>//WOS:000392289600002
%R 10.1103/PhysRevLett.118.030601
%U https://juser.fz-juelich.de/record/841822