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Towards a dynamical temperature of finite Hamiltonian systems |
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| Authors: | Shiwei Yan Qi Wang |
| Affiliation: | a College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China b Beijing Radiation Center, Beijing 100875, China c Center of Theoretical Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China |
| Abstract: | With the aid of numerical simulations of the β Fermi-Pasta-Ulam (FPU) system, we compare the different definitions of dynamical temperature for Hamiltonian systems. We have shown that each definition gives different values of temperature for a system with a small number of degrees of freedom (DOF). Only for systems with a sufficiently large number of DOF, do all the definitions of dynamical temperature approach the same value. |
| Keywords: | 24.60.Lz 05.45.-a 05.70.-a |
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