Temporal asymmetry of fluctuations in nonequilibrium steady states: links with correlation functions and nonlinear response.
The presence of temporal asymmetries in fluctuation paths of nonequilibrium systems has recently been confirmed numerically in nonequilibrium molecular dynamics simulations of particular deterministic systems. Here we show that this is a common feature of homogeneously driven and thermostatted, reversible, deterministic, chaotic, nonequilibrium systems of interacting particles. This is done by expressing fluctuation paths as correlation functions. The theoretical arguments look rather general, and we expect them to easily extend to other forms of driving and thermostats. The emergence of asymmetry is also justified using the transient time correlation function expression of nonlinear response theory. Numerical simulations are used to verify our arguments.
Paneni
Carlo
C
Nanoscale Science and Technology Centre, School of Biomolecular and Physical Sciences, Griffith University, Brisbane Qld 4111, Australia. cpaneni@gmail.com
Searles
Debra J
DJ
Rondoni
Lamberto
L
D001704:Biopolymers / Q000737:chemistry*; D003198:Computer Simulation; D008956:Models, Chemical; D008958:Models, Molecular; D017711:Nonlinear Dynamics; D044367:Phase Transition; D013223:Statistics as Topic; D013997:Time Factors
D001704:Biopolymers