Temperature fluctuations in the canonical ensemble

Chui, T.C.P.; Swanson, D.R.; Adriaans, M.J.; Nissen, J.A.; Lipa, J.A.

doi:10.1103/PhysRevLett.69.3005

Temperature fluctuations in the canonical ensemble

T.C.P. Chui
(
- Stanford U., Phys. Dept.
)
,
D.R. Swanson
(
- Stanford U., Phys. Dept.
)
,
M.J. Adriaans
(
- Stanford U., Phys. Dept.
)
,
J.A. Nissen
(
- Stanford U., Phys. Dept.
)
,
J.A. Lipa
(
- Stanford U., Phys. Dept.
)

Nov 23, 1992

3 pages

Published in:

Phys.Rev.Lett. 69 (1992) 3005-3008

DOI:

10.1103/PhysRevLett.69.3005

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Abstract: (APS)

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.

05.40.+j
07.20.Dt

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•
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