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arXiv 1502.07214cond-mat.stat-mech
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三维Blume-Capel模型的并行多正则性研究

Parallel multicanonical study of the three-dimensional Blume-Capel model

Johannes Zierenberg, Nikolaos G. Fytas, Wolfhard Janke

摘要:

本文用计算机模拟的方法研究了简单立方晶格上三维Blume-Capel模型的热力学性质。特别是,我们实现了一个并行化的变种的multicanonical方法,并通过保持恒定的温度和跨越沿晶场轴的相边界进行模拟。我们得到的数值数据的几个温度在第一和第二阶政权的模型。有限尺寸标度分析为我们提供了过渡点和尺寸标度行为的数值要求的一阶制度,以及一个明确的验证预期伊辛普适性在各自的二阶制度。最后,我们讨论了三临界点附近的标度行为。

英文摘要:

We study the thermodynamic properties of the three-dimensional Blume-Capel model on the simple cubic lattice by means of computer simulations. In particular, we implement a parallelized variant of the multicanonical approach and perform simulations by keeping a constant temperature and crossing the phase boundary along the crystal-field axis. We obtain numerical data for several temperatures in both the first- and second-order regime of the model. Finite-size scaling analyses provide us with transition points and the dimensional scaling behavior in the numerically demanding first-order regime, as well as a clear verification of the expected Ising universality in the respective second-order regime. Finally, we discuss the scaling behavior in the vicinity of the tricritical point.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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