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arXiv 0712.1190hep-latcond-mat.stat-mechhep-th
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如何控制Binder累积量中的非线性效应

How to control nonlinear effects in Binder cumulants

Yannick Meurice

摘要:

我们指出,忽略有限尺寸标度下的非线性效应可能导致临界温度和Binder累积量的估计误差。我们表明,这些影响的数量级的顺序可以从相对较小的体积的数据估计。使用这个估计,我们建议在体积增加时在越来越小的温度区域中使用线性拟合(而不是使用固定的温度间隔)。精确比例系数的选择可以优化,并揭示了估计值之间有趣的交叉模式。我们表明,新的程序非常适用于戴森的分层模型。讨论了该方法在三维自旋模型和有限温度格点规范理论中的应用,并对现有计算中的非线性效应作了评述。

英文摘要:

We point out that ignoring nonlinear effects in finite size scaling may lead to errors in estimates of the critical temperature and Binder cumulants. We show that the order of magnitude of these effects can be estimated from data at relatively small volume. Using this estimate, we propose to use linear fits in increasingly small temperature regions as the volume is increased (rather than using a fixed temperature interval). The choice of the exact coefficient of proportionality can be optimized and reveals interesting crossing patterns among estimates. We show that the new procedure works very well for Dyson's hierarchical model. We discuss applications of the method for 3 dimensional spin models and finite temperature lattice gauge theories and comment on the nonlinear effects for existing calculations.

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