Comment on "Fluctuation-dissipation relations in the nonequilibrium critical dynamics of Ising models"

Details Comment on "Fluctuation-dissipation relations in the nonequilibrium critical dynamics of Ising models" Comment on "Fluctuation-dissipation relations in the nonequilibrium critical dynamics of Ising models"

2003-09-29

arxiv.org/abs/cond-mat/0309652v3

Phys. Rev. E 70, 018101 (2004)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures included, shortened version

Scientific paper

10.1103/PhysRevE.70.018101

Recently Mayer et al. [Phys. Rev. E {\bf 68}, 016116 (2003)] proposed a new way to compute numerically the fluctuation-dissipation ratios in nonequilibrium critical systems. Using well-known facts of nonequilibrium critical dynamics I show that the leading contributions of the quantities they consider are in fact one-time quantities which are independent of the waiting time. The ratio of these one-time quantities determines the slope of the straight lines observed in the fluctuation-dissipation plots of Mayer et al.

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