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- W1991360674 abstract "We numerically study heat conduction in a few one-dimensional Fermi-Pasta-Ulam (FPU)-type lattices by both nonequilibrium heat bath and equilibrium Green-Kubo algorithms. In those lattices, heat conductivity κ is known to diverge with length N as Nα. It is commonly expected that the running exponent α should monotonously decreases with N and a recent study has shown that α for the FPU-β lattice saturates to 1/3 as N~104. However, our calculations clearly show that α changes its behaviour, increasing towards the asymptotic value 2/5 for yet larger N values. As for the purely quartic lattice, α=2/5 is clearly observed in four orders of magnitude of N ranging from 102 to 106. This unexpected reversal phenomenon can be observed more clearly in a much shorter FPU-αβ lattice." @default.
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- W1991360674 date "2011-03-01" @default.
- W1991360674 modified "2023-09-27" @default.
- W1991360674 title "Power-law divergent heat conductivity in one-dimensional momentum-conserving nonlinear lattices" @default.
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- W1991360674 doi "https://doi.org/10.1209/0295-5075/93/54002" @default.
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