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- W66266505 abstract "We investigate the relation between two‐time, multi‐spin, correlation and response functions in the non‐equilibrium dynamics of the Glauber‐Ising chain quenched to zero temperature. We find fluctuation‐dissipation relations qualitatively similar to those reported in various glassy materials, but quantitatively dependent on the chosen observable. Our results can be understood by considering separately the contributions from large wavevectors, which are at quasi‐equilibrium and obey the fluctuation dissipation theorem (FDT), and from small wavevectors where a generalized FDT holds with a non‐trivial fluctuation‐dissipation ratio X∞. For spin observables, reflecting critical aspects of the T = 0 quench, we get X∞ = 12 while defect observables produce X∞ = 0, revealing the underlying ordered phase. Our results suggest that the definition of an effective temperature Teff = T/X∞ for non‐equilibrated large length scales is generically possible in non‐equilibrium critical dynamics." @default.
- W66266505 created "2016-06-24" @default.
- W66266505 creator A5010784491 @default.
- W66266505 date "2004-01-01" @default.
- W66266505 modified "2023-09-25" @default.
- W66266505 title "Exact Non-Equilibrium Fluctuation Dissipation Relations for Multi-Spin Observables in the Glauber-Ising Spin Chain" @default.
- W66266505 doi "https://doi.org/10.1063/1.1764270" @default.
- W66266505 hasPublicationYear "2004" @default.
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