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arXiv 2011.02814math.PRmath-phmath.MP
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自由边界条件对高维Ising模型的影响

The effect of free boundary conditions on the Ising model in high dimensions

Federico Camia, Jianping Jiang, Charles M. Newman

摘要:

利用$\mathbb{Z}^d$研究了有限区域上自由边界条件下的临界伊辛模型.在假设下,到目前为止只证明了完全为高$d$,临界无限体积两点函数是$|x-y|^{-(d-2)}$阶大$|x-y|$,我们证明了同样的有效性与自由边界条件下的大有限立方体,只要$x, y$不太接近边界。这证实了物理文献中的数值预测表明,在有限域的线性尺寸$L$与自由边界条件下的临界磁化率的顺序$L^2$为$L\rightarrow\infty$。我们还证明了具有自由边界条件的近临界(小外场)伊辛磁化场的标度极限是高斯的,与临界标度极限具有相同的协方差,因此相关性不会指数衰减.这与低$d$中的情况或具有体边界条件的高$d$中的预期行为非常不同。

英文摘要:

We study the critical Ising model with free boundary conditions on finite domains in $\mathbb{Z}^d$ with $d\geq4$. Under the assumption, so far only proved completely for high $d$, that the critical infinite volume two-point function is of order $|x-y|^{-(d-2)}$ for large $|x-y|$, we prove the same is valid on large finite cubes with free boundary conditions, as long as $x, y$ are not too close to the boundary. This confirms a numerical prediction in the physics literature by showing that the critical susceptibility in a finite domain of linear size $L$ with free boundary conditions is of order $L^2$ as $L\rightarrow\infty$. We also prove that the scaling limit of the near-critical (small external field) Ising magnetization field with free boundary conditions is Gaussian with the same covariance as the critical scaling limit, and thus the correlations do not decay exponentially. This is very different from the situation in low $d$ or the expected behavior in high $d$ with bulk boundary conditions.

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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