Approaching the master-field: Hadronic observables in large volumes
Approaching the master-field: Hadronic observables in large volumes
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DOI：
10.22323/1.396.0383
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发表时间：
2021-10
期刊：
影响因子：
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通讯作者：
M. Cè;M. Bruno;J. Bulava;A. Francis;P. Fritzsch;J. Green;M. Hansen;A. Rago
中科院分区：
文献类型：
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作者：
M. Cè;M. Bruno;J. Bulava;A. Francis;P. Fritzsch;J. Green;M. Hansen;A. Rago
格点QCD的主场方法设想在少量大体积规范场配置上执行计算。最近在产生这种场方面取得了重大进展，这必须与利用大体积的测量战略相结合。在这些论文中，我们描述了如何有效地计算简单的强子量，并在主场方法中估计它们的误差，即通过研究单个配置上的可观测量的互相关。我们讨论了缩放的不确定性与体积和比较提取的基础上的动量投影和位置空间两点函数。后者显示出有希望的结果，已经在中间量，但带来了额外的技术复杂性，如更复杂的表现形式的边界效应，我们也解决。
The master-field approach to lattice QCD envisions performing calculations on a small number of large-volume gauge-field configurations. Substantial progress has been made recently in the generation of such fields, and this must be joined with measurement strategies that take advantage of the large volume. In these proceedings, we describe how to compute simple hadronic quantities efficiently and estimate their errors in the master-field approach, i.e. by studying cross-correlations of observables on a single configuration. We discuss the scaling of the uncertainty with the volume and compare extractions based on momentum-projected and position-space two-point functions. The latter show promising results, already at intermediate volumes, but come with additional technical complexities such as a more complicated manifestation of boundary effects, which we also address.