出典:Wikipedia
出典:『Wikipedia』 (2011/07/08 21:05 UTC 版)
The Ising model (English pronunciation: /ˈaɪsɪŋ/, German: [iːzɪŋ]) is a mathematical model of ferromagnetism in statistical mechanics. The model consists of discrete variables called spins that can be in one of two states. The spins are arranged in a lattice or graph, and each spin interacts at most with its nearest neighbors. The goal is to find phase changes in the Ising model, as a simplified model of phase changes in real substances. The two-dimensional square lattice Ising model is one of the simplest statistical models to show a phase change.