Complex Langevin dynamics for dynamical QCD at nonzero chemical potential: A comparison with multiparameter reweighting
Complex Langevin dynamics for dynamical QCD at nonzero chemical potential: A comparison with multiparameter reweighting
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DOI：
10.1103/physrevd.92.094516
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发表时间：
2015-08
影响因子：
5
通讯作者：
Z. Fodor;Z. Fodor;S. Katz;D. Sexty;C. Torok
中科院分区：
文献类型：
--
作者：
Z. Fodor;Z. Fodor;S. Katz;D. Sexty;C. Torok
本文利用复朗之万方程研究了非零化学势下的格点QCD。我们比较的结果与多参数重新加权从$\mu=0$和相位淬火合奏。我们发现一个很好的协议低于0.15 fm的晶格间距。在较粗糙的晶格上，复杂的朗之万方法失效了。在N_t=4，6$和8格点上采用了四种交错费米子.对于一个合奏，我们还使用两种口味来研究生根的影响。
We study lattice QCD at non-vanishing chemical potential using the complex Langevin equation. We compare the results with multi-parameter reweighting both from $\mu=0$ and phase quenched ensembles. We find a good agreement for lattice spacings below $\approx$0.15 fm. On coarser lattices the complex Langevin approach breaks down. Four flavors of staggered fermions are used on $N_t=4, 6$ and 8 lattices. For one ensemble we also use two flavors to investigate the effects of rooting.