title: Information exchange dynamics of the two-dimensional XY model.
abstract: Information exchange dynamics of the two-dimensional XY model is studied by means of the entropic sampling algorithm. Combining the analytic and numerical results, we obtain the entropy in the whole range of the energy at various system sizes. The time evolution of the order parameter and of the number of vortices is explored, and the corresponding relaxation times are found to grow algebraically with the system size. Such absence of characteristic time scales in the thermodynamic limit manifests the emergent criticality of the exchanging process of information with the environment. The mechanism of information exchange in the XY model is discussed in terms of the dynamic exponents, in comparison with the Ising model.
authors: Department of Physics and Astronomy and Center for Theoretical Physics, Seoul National University, Seoul 151-747, Korea and Soil and Terrestrial Environmental Physics (STEP), Institute of Terrestrial Ecosystems (ITES), ETH Zurich, 8092 Zurich, Switzerland.
authors: Minsu
authors: M
authors: Kim
authors: Computational Science Group, Samsung Advanced Institute of Technology, Yongin 446-712, Korea.
authors: Daun
authors: D
authors: Jeong
authors: Department of Physics and Astronomy and Center for Theoretical Physics, Seoul National University, Seoul 151-747, Korea and School of Physics, Korea Institute for Advanced Study, Seoul 130-722, Korea.
authors: H W
authors: HW
authors: Kwon
authors: Department of Physics and Astronomy and Center for Theoretical Physics, Seoul National University, Seoul 151-747, Korea.
authors: M Y
authors: MY
authors: Choi