2007年7月
Nonequilibrium tricritical point in a system with long-range interactions
PHYSICAL REVIEW LETTERS
- ,
- ,
- ,
- 巻
- 99
- 号
- 4
- 開始ページ
- 040601
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.99.040601
- 出版者・発行元
- AMER PHYSICAL SOC
Systems with long-range interactions display a short-time relaxation towards quasistationary states whose lifetime increases with system size. With reference to the Hamiltonian mean field model, we here show that a maximum entropy principle, based on Lynden-Bell's pioneering idea of "violent relaxation," predicts the presence of out-of-equilibrium phase transitions separating the relaxation towards homogeneous (zero magnetization) or inhomogeneous (nonzero magnetization) quasistationary states. When varying the initial condition within a family of "water bags" with different initial magnetization and energy, first- and second-order phase transition lines are found that merge at an out-of-equilibrium tricritical point. Metastability is theoretically predicted and numerically checked around the first-order phase transition line.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevLett.99.040601
- ISSN : 0031-9007
- eISSN : 1079-7114
- Web of Science ID : WOS:000248345800006