Scaling of thermal conductivity of helium confined in pores

Details Scaling of thermal conductivity of helium confined in pores Scaling of thermal conductivity of helium confined in pores

2001-03-02

arxiv.org/abs/cond-mat/0103072v1

Physics

Condensed Matter

Statistical Mechanics

5 two-column pages, 3 figures, Revtex 4

Scientific paper

10.1103/PhysRevB.64.144513

We have studied the thermal conductivity of confined superfluids on a bar-like geometry. We use the planar magnet lattice model on a lattice $H\times H\times L$ with $L \gg H$. We have applied open boundary conditions on the bar sides (the confined directions of length $H$) and periodic along the long direction. We have adopted a hybrid Monte Carlo algorithm to efficiently deal with the critical slowing down and in order to solve the dynamical equations of motion we use a discretization technique which introduces errors only $O((\delta t)^6)$ in the time step $\delta t$. Our results demonstrate the validity of scaling using known values of the critical exponents and we obtained the scaling function of the thermal resistivity. We find that our results for the thermal resistivity scaling function are in very good agreement with the available experimental results for pores using the temp

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