Fri, 25 Jul 2008 04:30:15 BST CiteULike: dchens Eiser http://www.citeulike.org/user/dchen/author/Eiser CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/1988262 <i>Physical Review Letters, Vol. 98, No. 10. (2007)</i><br /><br />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. Fluctuation-Dissipation Theorem in an Aging Colloidal Glass Sara Farouji Daisuke Mizuno Maryam Atakhorrami Fred Mackintosh Christoph Schmidt Erika Eiser Gerard Wegdam Daniel Bonn doi:10.1103/PhysRevLett.98.108302 Physical Review Letters, Vol. 98, No. 10. (2007) 2007-11-26T20:20:36-00:00 2007 Physical Review Letters 98 10 APS 2007 aging colloids experiment glass theory