NASA NTRS · 19930033147
Temperature fluctuations in the canonical ensemble
Abstract
We report the first quantitative measurements of spontaneous temperature fluctuations in a physical system well modeled by a canonical ensemble. Using superconducting magnetometers and a carefully controlled thermal environment, we have measured the noise spectra of paramagnetic salt thermometers that were coupled to thermal reservoirs at 2 K. The noise spectra were found to be in very good agreement with the predictions of the fluctuation-dissipation theorem. Our observations are at variance with some interpretations of fluctuations in the canonical ensemble.
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Chui, T. C. P., Swanson, D. R., Adriaans, M. J., Nissen, J. A., Lipa, J. A.. 1992-11-23. Temperature fluctuations in the canonical ensemble. https://ntrs.nasa.gov/citations/19930033147
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