We study heat conduction in one, two and three dimensional anharmonic
lattices connected to stochastic Langevin heat baths. The inter-atomic
potential of the lattices is double-well type, i.e., VDWβ(x)=k2βx2/2+k4βx4/4 with k2β0. We observe two different
temperature regimes of transport: a high-temperature regime where asymptotic
length dependence of nonequilibrium steady state heat current is similar to the
well-known Fermi-Pasta-Ulam lattices with an inter-atomic potential, VFPUβ(x)=k2βx2/2+k4βx4/4 with k2β,k4β>0. A low temperature regime where
heat conduction is diffusive normal satisfying Fourier's law. We present our
simulation results at different temperature regimes in all dimensions.Comment: 5 pages, 7 figure