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Journal articles
Fluctuations in an aging system: the absence of an effective temperature in the sol–gel transition of a quenched gelatin sample
Abstract : We study the fluctuations of a Brownian micro particle trapped with optical tweezers in a gelatin solution undergoing a fast local temperature quench below the sol-gel transition. Contrary to what was previously reported, we observe no anomalous fluctuations in the particle's position that could be interpreted in terms of an effective temperature. A careful analysis with ensemble averages shows only equilibrium-like properties for the fluctuations, even though the system is clearly aging. We also provide a detailed discussion on possible artifacts that could have been interpreted as an effective temperature, such as the presence of a drift or a mixing in time and ensemble averages in data analysis. These considerations are of general interest when dealing with non-ergodic or non-stationary systems.
Cited literature [26 references]
https://hal-ens-lyon.archives-ouvertes.fr/ensl-01192667
Contributor : Sergio Ciliberto <>
Submitted on : Thursday, September 3, 2015 - 11:41:36 AM
Last modification on : Monday, December 16, 2019 - 4:02:14 PM
Long-term archiving on: : Friday, December 4, 2015 - 11:01:38 AM
Contributor : Sergio Ciliberto <>
Submitted on : Thursday, September 3, 2015 - 11:41:36 AM
Last modification on : Monday, December 16, 2019 - 4:02:14 PM
Long-term archiving on: : Friday, December 4, 2015 - 11:01:38 AM
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gelatine_v4.pdf
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