Ye. Vekhov, R. B. Hallock
At pressure $\sim$ 25.7 bar the flux, $F$, carried by solid \4he for $T >$ 100 mK depends on the net chemical potential difference between two reservoirs in series with the solid, $\Delta \mu$, and obeys $F \sim (\Delta \mu)^b$, where $b \approx 0.3$ is independent of temperature. At fixed $\Delta \mu$ the temperature dependence of the flux, $F$, can be adequately represented by $F \sim - \ln(T/\tau)$, $\tau \approx 0.6$ K, for $0.1 \leq T \leq 0.5$ K. A single function $F = F_0(\Delta \mu)^b\ln(T/\tau)$ fits all of the available data sets in the range 25.6 - 25.8 bar reasonably well. We suggest that the mass flux in solid \4he for $T > 100$ mK may have a Luttinger liquid-like behavior in this bosonic system.
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http://arxiv.org/abs/1205.5751
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