Equilibration and Universal Heat Conduction in Fermi-Pasta-Ulam Chains

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2713

Title:	Equilibration and Universal Heat Conduction in Fermi-Pasta-Ulam Chains
Authors:	Mai, Trieu Dhar, Abhishek Narayan, Onuttom
Issue Date:	4-May-2007
Publisher:	American Physical Society
Citation:	Physical Review Letters, 2007, Vol.98, p184301
Abstract:	It is shown numerically that for Fermi-Pasta-Ulam (FPU) chains with alternating masses and heat baths at slightly different temperatures at the ends, the local temperature (LT) on small scales behaves paradoxically in steady state. This expands the long established problem of equilibration of FPU chains. A well-behaved LT appears to be achieved for equal mass chains; the thermal conductivity is shown to diverge with chain length N as N1/3, relevant for the much debated question of the universality of one-dimensional heat conduction. The reason why earlier simulations have obtained systematically higher exponents is explained.
Description:	Open Access. Includes a reply by the authors to the comment by Luca Delfini et al..
URI:	http://hdl.handle.net/2289/2713
ISSN:	0031-9007 1079-7114 (online)
Alternative Location:	http://link.aps.org/abstract/PRL/v98/e184301 http://dx.doi.org/10.1103/PhysRevLett.98.184301
Copyright:	2007 The American Physical Society
Appears in Collections:	Research Papers (TP)

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2008 PRL_100_199402_comment.pdf Restricted Access	reply	43.75 kB	Adobe PDF	View/Open Request a copy