论文标题
优化晶格上炭光谱的创建算子
Optimising creation operators for charmonium spectroscopy on the lattice
论文作者
论文摘要
在应用复合强子创建操作员之前，在晶格计算中涂抹裸量子场的记录很长，可以实质上改善重叠到低洼的能量特征态。一种称为蒸馏的技术，该技术将夸克场的涂抹定义为一个低级线性投影算子，该技术在平滑仪表式磁场的较小矢量空间中已被证明是有效的，并且在强大的计算成本中既有效又具有多功能性。在本文中，引入和优化了平滑场中的更多普通操作员，这在接近Charmonium Energy量表的重型夸克 - 雄性Quark对系统上进行测试时，可以增强该方法的性能。
Smearing the bare quantum fields in lattice calculations before applying composite hadron creation operators has a long record of substantially improving overlaps onto low-lying energy eigenstates. A technique called distillation which defines smearing for quark fields as a low-rank linear projection operator into a small vector space of smooth gauge-covariant fields has proven to be both effective and versatile in hadron spectroscopy calculations albeit with significant computational cost . In this paper, more general operators in this space of smooth fields are introduced and optimised, which enhances the performance of the method when tested on systems of heavy quark-anti-quark pairs close to the charmonium energy scale.
