Studying and removing effects of fixed topology

Studying and removing effects of fixed topology
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研究并消除固定拓扑的影响

DOI:
10.5506/aphyspolbsupp.7.551
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发表时间:
2014
期刊:
arXiv: High Energy Physics - Lattice
影响因子:
--
通讯作者:
M. Wagner
M. Wagner
中科院分区:
--
文献类型:
--
作者:
C. Czaban;A. Dromard;M. Wagner

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当晶格间距较小,或者使用重叠费米子时,晶格QCD模拟往往会陷入单个拓扑扇区。物理观测值,例如强子质量,与其完整的QCD对应物有1/V的修正,其中V是时空体积。这些修正可以用鞍点法逐级计算。我们计算了所有与1/V 2和1/V 3成比例的修正,并测试了几种模型的结果方程:圆上的量子力学粒子、Schwinger模型和SU(2) Yang-Mills理论。
At small lattice spacing, or when using overlap fermions, lattice QCD simulations tend to become stuck in a single topological sector. Physical observables, e.g. hadron masses, then differ from their full QCD counterparts by 1/V corrections, where V is the spacetime volume. These corrections can be calculated order by order using the saddle point method. We calculate all corrections proportional to 1/V 2 and 1/V 3 and test the resulting equations for several models: a quantum mechanical particle on a circle, the Schwinger model and SU(2) Yang-Mills theory.
从固定拓扑模拟中提取强子质量
DOI: 10.1103/physrevd.90.074505
发表时间: 2014
期刊: Physical Review D
影响因子: 5
作者:
A. Dromard;M. Wagner
通讯作者: M. Wagner
使用拓扑固定操作比较拓扑电荷定义
DOI: 10.1140/epja/i2010-10915-1
发表时间: 2010
期刊: The European Physical Journal A
影响因子: --
作者:
Bruckmann;Gruber;Jansen;Marinkovic;Urbach;Wagner
通讯作者: Wagner