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

The effect of free boundary conditions on the Ising model in high dimensions
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自由边界条件对高维伊辛模型的影响

DOI:
10.1007/s00440-021-01041-9
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发表时间:
2020-11
影响因子:
2
通讯作者:
Charles M. Newman
Charles M. Newman
中科院分区:
数学1区
文献类型:
--
作者:
Federico Camia;Jianping Jiang;Charles M. Newman

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我们研究了有限域上具有自由边界条件的临界伊辛模型。在迄今为止只完全证明了highd的假设下,临界无限体积两点函数是大阶的,我们证明这对于具有自由边界条件的大有限立方体也是有效的,只要x,y不太接近边界。这证实了物理文献中的数值预测,表明具有自由边界条件的线性大小 L 的有限域中的临界磁化率是有序的。我们还证明,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分布,具有与临界标度极限相同的协方差,因此相关性不会呈指数衰减。这与 lowd 中的情况或具有体边界条件的 highd 中的预期行为非常不同。
We study the critical Ising model with free boundary conditions on finite domains inwith. Under the assumption, so far only proved completely for highd, that the critical infinite volume two-point function is of orderfor large, we prove the same is valid on large finite cubes with free boundary conditions, as long asx,yare 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 sizeLwith free boundary conditions is of orderas. 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 lowdor the expected behavior in highdwith bulk boundary conditions.
DOI: 10.1016/j.nuclphysb.2014.10.011
发表时间: 2014-08
期刊: Nuclear Physics
影响因子: --
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