arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.4557cond-mat.stat-mech
收藏

二维和三维横场伊辛模型的实空间重整化群

Real-space renormalization group for the transverse-field Ising model in two and three dimensions

Ryoji Miyazaki, Hidetoshi Nishimori, Gerardo Ortiz

摘要:

本文用实空间重整化群方法分析了具有铁磁交换作用的二维和三维横场伊辛模型。的基本策略是一个推广的方法开发的一维情况下,利用重整化下的模型的精确不变性,并已知给临界点和临界指数$ν$的精确值。所得的临界指数$ν$在二维和三维中的值与经典的伊辛模型在三维和四维中的值符合得很好。这是第一个例子,其中一个实空间重整化群(2+1)-和(3+1)-维布拉维格产生准确的估计的临界指数。

英文摘要:

The two- and three-dimensional transverse-field Ising models with ferromagnetic exchange interactions are analyzed by means of the real-space renormalization group method. The basic strategy is a generalization of a method developed for the one-dimensional case, which exploits the exact invariance of the model under renormalization and is known to give the exact values of the critical point and critical exponent $ν$. The resulting values of the critical exponent $ν$ in two and three dimensions are in good agreement with those for the classical Ising model in three and four dimensions. This is the first example in which a real-space renormalization group on (2+1)- and (3+1)-dimensional Bravais lattices yields accurate estimates of the critical exponents.

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。

↑