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Criticality and Superfluidity in liquid He-4 under Nonequilibrium Conditions | | Peter B. Weichman
; Alexa W. Harter
; David L. Goodstein
; | | Date: |
29 Aug 2000 | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Abstract: | We review a striking array of recent experiments, and their theoretical interpretations, on the superfluid transition in $^4$He 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. | | Source: | arXiv, cond-mat/0008430 | | Services: | Forum | Review | PDF | Favorites | |
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