Fluctuation-dissipation theorem in an aging colloidal glass.
نویسندگان
چکیده
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.
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ورودعنوان ژورنال:
- Physical review letters
دوره 98 10 شماره
صفحات -
تاریخ انتشار 2007