Dynamics and thermodynamics of rotators interacting with both long- and short-range couplings |
| |
Institution: | 1. Faculty of Natural Resources, College of Agriculture and Natural Resources, University of Tehran, Iran;2. School of Forest Resources, College of Agriculture, Pennsylvania State University, USA |
| |
Abstract: | The effect of nearest-neighbor coupling on the thermodynamic and dynamical properties of the ferromagnetic Hamiltonian mean field model (HMF) is studied. For a range of antiferromagnetic nearest-neighbor coupling, a canonical first-order transition is observed, and the canonical and microcanonical ensembles are non-equivalent. In studying the relaxation time of non-equilibrium states it is found that as in the HMF model, a class of non-magnetic states is quasi-stationary, with an algebraic divergence of their lifetime with the number of degrees of freedom N. The lifetime of metastable states is found to increase exponentially with N as expected. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|