期刊
PHYSICAL REVIEW LETTERS
卷 97, 期 26, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.97.265702
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资金
- Engineering and Physical Sciences Research Council [GR/T05783/01] Funding Source: researchfish
We study the thermal fluctuations of an optically confined probe particle, suspended in an aging colloidal suspension, as the suspension transforms from a viscous liquid into an elastic glass. The micron-sized bead forms a harmonic oscillator. By monitoring the equal-time fluctuations of the tracer, at two different laser powers we determine the temperature of the oscillator, T-o. In the ergodic liquid the temperatures of the oscillator and its environment are equal, while in contrast, in a nonequilibrium glassy phase we find that T-o substantially exceeds the bath temperature.
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