Criticality and Superfluidity in liquid He-4 under Nonequilibrium Conditions
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...
Saved in:
Main Authors | , , |
---|---|
Format | Journal Article |
Language | English |
Published |
29.08.2000
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | 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. |
---|---|
DOI: | 10.48550/arxiv.cond-mat/0008430 |