TY - JOUR
T1 - Heat conduction in one-dimensional oscillator lattices using Nosé-Hoover chain thermostats
AU - Romero-Bastida, M.
AU - Aguilar, J. F.
PY - 2006/9/8
Y1 - 2006/9/8
N2 - In this work, we numerically study the dynamical evolution and heat transport properties of a system that consists of two time-reversible thermostats connected either by a one-dimensional Fermi-Pasta-Ulam or a Frenkel-Kontorova oscillator lattice, which are representative models of momentum-conserving and nonconserving systems, respectively. The thermostats were described by a chain of variables, Nosé-Hoover chains, which enhances the ergodicity of the thermostats in comparison to the Nosé-Hoover method. The time evolution of both lattices is not significantly altered by the dynamics of the thermostats. The temperature profile and heat flux of the Fermi-Pasta-Ulam model are more sensitive to the dynamics of the extended variables than those corresponding to the Frenkel-Kontorova model. Nevertheless we reproduce the scaling properties of the thermal conductivity with system size obtained by other authors.
AB - In this work, we numerically study the dynamical evolution and heat transport properties of a system that consists of two time-reversible thermostats connected either by a one-dimensional Fermi-Pasta-Ulam or a Frenkel-Kontorova oscillator lattice, which are representative models of momentum-conserving and nonconserving systems, respectively. The thermostats were described by a chain of variables, Nosé-Hoover chains, which enhances the ergodicity of the thermostats in comparison to the Nosé-Hoover method. The time evolution of both lattices is not significantly altered by the dynamics of the thermostats. The temperature profile and heat flux of the Fermi-Pasta-Ulam model are more sensitive to the dynamics of the extended variables than those corresponding to the Frenkel-Kontorova model. Nevertheless we reproduce the scaling properties of the thermal conductivity with system size obtained by other authors.
UR - http://www.scopus.com/inward/record.url?scp=33747588311&partnerID=8YFLogxK
U2 - 10.1088/0305-4470/39/36/003
DO - 10.1088/0305-4470/39/36/003
M3 - Artículo
SN - 0305-4470
VL - 39
SP - 11155
EP - 11170
JO - Journal of Physics A: Mathematical and General
JF - Journal of Physics A: Mathematical and General
IS - 36
M1 - 003
ER -