论文标题
恢复晶格QCD传播器的旋转不变性
Restoring rotational invariance for lattice QCD propagators
论文作者
论文摘要
本说明提出了一种减少离散化误差在位置和动量空间中的量子晶格中求解量子场理论时出现的离散误差的方法。该方法利用破坏旋转对称性的伪影以恢复两点绿色功能的旋转结果。我们表明，在位置和动量空间中获得的结果的组合对于信号的存在是有用的，该伪影的存在，利用其在连续体中使用它们的近似傅立叶变换。该方法将使用klein-gordon传播器引入，并将在淬灭晶格QCD中直接应用于Gluon传播器。
This note presents a method to reduce the discretization errors appearing when solving a Quantum Field Theory in a hypercubic lattice in both position and momentum-space. The method exploits the artifacts that break rotational symmetry to recover rotationally invariant results for two-point Green functions. We show that a combination of the results obtained in position and momentum space can be useful to signal the presence of rotationally invariant artifacts making use of their approximate Fourier transforms in the continuum. The method will be introduced using a Klein-Gordon propagator, and a direct application to gluon propagator in quenched lattice QCD will be given.
