Topology of dynamical lattice configurations including results from dynamical overlap fermions

Topology of dynamical lattice configurations including results from dynamical overlap fermions
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动态晶格构型的拓扑,包括动态重叠费米子的结果

DOI:
10.1016/j.physletb.2011.12.030
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发表时间:
2012
期刊:
影响因子:
4.4
通讯作者:
Th. Lippert
Th. Lippert
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Falk Bruckmann;F. Gruber;N. Cundy;A. Schäfer;Th. Lippert

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我们研究了费米子作用引起的手征对称性破坏对格点QCD模拟中拓扑电荷密度的影响。为此,我们比较晶格配置产生了一些不同的行动,包括第一配置产生的确切的动力学重叠夸克。我们可视化的拓扑轮廓后,温和的涂抹。在拓扑电荷相关器中,我们测量了正核的大小,这是已知的收缩到零扩展的连续极限。为了领导秩序,我们发现核心的大小与晶格间距线性缩放具有相同的系数,所有的行动,甚至包括淬火模拟。在子引导项中,不同的动作在约10%的范围内变化。我们的研究结果表明,在当前的晶格间距的非手征晶格行动并没有太大的不同拓扑结构相关的观测,无论是在自己之间和重叠费米子相比。
We investigate how the topological charge density in lattice QCD simulations is affected by violations of chiral symmetry caused by the fermion action. To this end we compare lattice configurations generated with a number of different actions including first configurations generated with exact dynamical overlap quarks. We visualize the topological profiles after mild smearing. In the topological charge correlator we measure the size of the positive core, which is known to shrink to zero extension in the continuum limit. To leading order we find the core size to scale linearly with the lattice spacing with the same coefficient for all actions, even including quenched simulations. In the subleading term the different actions vary over a range of about 10%. Our findings suggest that non-chiral lattice actions at current lattice spacings do not differ much for observables related to topology, both among themselves and compared to overlap fermions.
DOI: --
发表时间: 2005
期刊:
影响因子: --
作者:
N. Cundy
通讯作者: N. Cundy
纯胶QCD中基于重叠的拓扑电荷密度相关器的负性及其接触部分的不可积性质
DOI: --
发表时间: 2005
期刊:
影响因子: --
作者:
Iván Horvath;A. Alexandru;Jian;Yu;S. Dong;T. Draper;K. Liu;N. Mathur;S. Tamhankar;H. Thacker
通讯作者: H. Thacker
DOI: 10.22323/1.042.0090
发表时间: 2007
期刊: Physical Review D
影响因子: 5
作者:
C. Bernard;D. Toussaint;L. Levkova;S. Gottlieb;C. DeTar;J. Hetrick;J. Osborn;U. Heller;D. Renner;R. Sugar
通讯作者: R. Sugar
QCD 真空的过滤拓扑结构:动力夸克的影响
DOI: 10.1016/j.physletb.2010.02.077
发表时间: 2009
期刊: Physics Letters B
影响因子: 4.4
作者:
F. Bruckmann;F. Gruber;A. Schafer
通讯作者: A. Schafer
动态重叠费米子:模拟和物理结果
DOI: --
发表时间: 2005
期刊:
影响因子: --
作者:
S. Schaefer;T. DeGrand
通讯作者: T. DeGrand