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arXiv 2102.09068cond-mat.stat-mech
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由三维伊辛模型中的概率分布确定临界点

Critical point determination from probability distribution functions in the three dimensional Ising model

Francisco Sastre

摘要:

在这项工作中,我们提出了一个新的数值方法来评估的临界点,磁化率临界指数和相关长度临界指数的三维伊辛模型无外场使用的算法,直接计算的概率分布函数的对数相对于磁化强度的导数。使用标准的有限尺寸标度理论,我们发现,在这种方法中不存在校正标度效应。我们的结果与以前报道的三维伊辛模型的结果符合得很好。

英文摘要:

In this work we propose a new numerical method to evaluate the critical point, the susceptibility critical exponent and the correlation length critical exponent of the three dimensional Ising model without external field using an algorithm that evaluates directly the derivative of the logarithm of the probability distribution function with respect to the magnetisation. Using standard finite-size scaling theory we found that correction-to-scaling effects are not present within this approach. Our results are in good agreement with previous reported values for the three dimensional Ising model.

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