Fluctuation-dissipation theorem in an aging colloidal glass

S. Jabbari-Farouji, D. Mizuno, M. Atakhorrami, F.C. Mac Kintosh, C. Schmidt, E. Eiser, G. H. Wegdam, D. Bonn

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We provide a direct experimental test of the fluctuation-dissipation theorem (FDT) in an aging colloidal glass. The use of combined active and passive microrheology allows us to independently measure both the correlation and response functions in this nonequilibrium situation. Contrary to previous reports, we find no deviations from the FDT over several decades in frequency (1 Hz-10 kHz) and for all aging times. In addition, we find two distinct viscoelastic contributions in the aging glass, including a nearly elastic response at low frequencies that grows during aging. © 2007 The American Physical Society.
Original languageEnglish
Article number108302
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 9 Mar 2007

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Fluctuation-dissipation theorem in an aging colloidal glass


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