title: Dynamic correlations of macroscopic quantities.
abstract: The dynamics of fluctuations of a family of macroscopic quantities in one-dimensional systems (which includes the roughness and the total length of an interface, and the end-to-end distance of a filament) are analyzed. At thermodynamic equilibrium, the time-correlation function of these quantities can be expressed in terms of time-correlation functions of local quantities. In some cases, macroscopic quantities exhibit a universal diffusive behavior, which is not reached by local quantities.
authors.affiliation: CNRS/Rudolf Peierls Centre for Theoretical Physics, 1 Keble Road, Oxford, United Kingdom.
authors.forename: Olivier
authors.initials: O
authors.lastname: Pierre-Louis