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Criticality and superfluidity in liquid ^4He under nonequilibrium conditions

Weichman, Peter B. and Harter, Alexa W. and Goodstein, David L. (2001) Criticality and superfluidity in liquid ^4He under nonequilibrium conditions. Reviews of Modern Physics, 73 (1). pp. 1-15. ISSN 0034-6861.

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We review a striking array of recent experiments and their theoretical interpretations on the superfluid transition in ^4He in the presence of a heat flux Q. We define and evaluate a new set of critical point exponents. The statics and dynamics of the superfluid-normal interface are discussed, with special attention to the role of gravity. If Q is in the same direction as gravity, a self-organized state can arise, in which the entire sample has a uniform reduced temperature, on either the normal or superfluid side of the transition. Finally, we review recent theory and experiment regarding the heat capacity at constant Q. The excitement that surrounds this field arises from the fact that advanced thermometry and the future availability of a microgravity experimental platform aboard the International Space Station will soon open to experimental exploration decades of reduced temperature that were previously inaccessible.

Item Type:Article
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Additional Information:© 2001 The American Physical Society. Published 2 January 2001.
Classification Code:PACS: 67.40.Kh, 05.70.Jk, 67.20.+k, 64.60.Fr, 42.27.Te
Record Number:CaltechAUTHORS:20111108-110900714
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:27672
Deposited By: Tony Diaz
Deposited On:08 Nov 2011 22:34
Last Modified:26 Dec 2012 14:23

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