TY  - JOUR
AU  - Karevski, D.
AU  - Schütz, G. M.
TI  - Conformal Invariance in Driven Diffusive Systems at High Currents
JO  - Physical review letters
VL  - 118
IS  - 3
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2018-00123
SP  - 030601
PY  - 2017
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:28157348
UR  - <Go to ISI:>//WOS:000392289600002
DO  - DOI:10.1103/PhysRevLett.118.030601
UR  - https://juser.fz-juelich.de/record/841822
ER  -