arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.3458cond-mat.stat-mechcond-mat.str-el
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有限温度下边界Ising链的局域磁化

Local Magnetization in the Boundary Ising Chain at Finite Temperature

Eran Sela, Andrew K. Mitchell

摘要:

研究了半无限长圆柱体上二维伊辛模型在临界温度下的局域磁化强度,并在圆周$β$的圆形边界上施加非零磁场$h$.该模型等价于温度为$T \propto β^{-1}$的半无限量子临界一维横向场伊辛模型,在点边界处施加一个破缺场$\propto h$.利用共形场论方法,我们得到了连续极限下局部磁化强度的全标度函数,从而改进了Leclair,Lesage和Saleur在参考文献\onlinecite{Leclair}中的结果.我们的结果的有效性作为连续极限的1-D晶格模型的数值证实,利用修改后的Jordan-Wigner表示。讨论了结果的应用。

英文摘要:

We study the local magnetization in the 2-D Ising model at its critical temperature on a semi-infinite cylinder geometry, and with a nonzero magnetic field $h$ applied at the circular boundary of circumference $β$. This model is equivalent to the semi-infinite quantum critical 1-D transverse field Ising model at temperature $T \propto β^{-1}$, with a symmetry-breaking field $\propto h$ applied at the point boundary. Using conformal field theory methods we obtain the full scaling function for the local magnetization analytically in the continuum limit, thereby refining the previous results of Leclair, Lesage and Saleur in Ref. \onlinecite{Leclair}. The validity of our result as the continuum limit of the 1-D lattice model is confirmed numerically, exploiting a modified Jordan-Wigner representation. Applications of the result are discussed.

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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