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arXiv 1003.4887cond-mat.stat-mech
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由非平衡含时量确定临界温度

Identification of the critical temperature from non-equilibrium time-dependent quantities

Eugenio Lippiello, Alessandro Sarracino

摘要:

提出了一种新的方法来确定和测量临界温度。该方法是基于弛豫时间从无限温度到淬火临界点的发散。我们引入了一个无量纲量,它在临界温度下与时间无关。该过程不需要平衡,并且允许相对快速地识别临界温度。该方法首先在铁磁伊辛模型中进行了测试,然后将其应用于具有幂律相互作用的一维伊辛自旋玻璃。在这里,我们总是发现一个有限的临界温度也存在一个均匀的外部场,在协议的自旋玻璃的低温相的平均场图片。

英文摘要:

We present a new procedure able to identify and measure the critical temperature. This method is based on the divergence of the relaxation time approaching the critical point in quenches from infinite temperature. We introduce a dimensionless quantity that turns out to be time-independent at the critical temperature. The procedure does not need equilibration and allows for a relatively fast identification of the critical temperature. The method is first tested in the ferromagnetic Ising model and then applied to the one-dimensional Ising spin glass with power-law interactions. Here we always find a finite critical temperature also in presence of a uniform external field, in agreement with the mean-field picture for the low temperature phase of spin glasses.

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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