Complex Langevin dynamics for dynamical QCD at nonzero chemical potential: A comparison with multiparameter reweighting

被引：43
|
作者：
Fodor, Z. [1 ,2 ,3 ]
Katz, S. D. [3 ,4 ]
Sexty, D. [1 ]
Torok, C. [3 ,4 ]
机构：
[1] Wuppertal Univ, Dept Phys, Gaussstr 20, D-42119 Wuppertal, Germany
[2] Forschungszentrum Julich, Julich Supercomp Ctr, D-52425 Julich, Germany
[3] Eotvos Lorand Univ, Inst Theoret Phys, H-1117 Budapest, Hungary
[4] MTA ELTE Lendulet Lattice Gauge Theory Res Grp, H-1117 Budapest, Hungary
来源：
PHYSICAL REVIEW D | 2015年 / 92卷 / 09期
关键词：
LATTICE QCD; SIMULATIONS; EQUATION;
D O I：
10.1103/PhysRevD.92.094516
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study lattice QCD at nonvanishing chemical potential using the complex Langevin equation. We compare the results with multiparameter reweighting both from mu = 0 and phase-quenched ensembles. We find a good agreement for lattice spacings below approximate to 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.
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页数：9
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