标题： 非零动量关联函数在格点模拟中的计算与应用 显示英文标题

标题： On the calculation and use of non-zero momentum correlators in lattice simulations

摘要： 在格点模拟中，通常对零空间动量的关联函数进行投影以计算质量及相关谱数据。 然而，对空间格点的求和会丢弃可能在计算不相连图时特别有用的信息。 通过使用动量守恒，可以以很少的额外计算成本计算不相连图的非零动量分量以及其他与空间卷积相关的量，并可能在分析不相连关联函数时有所帮助。 显示英文摘要

摘要： In lattice simulations one generally projects correlators over zero spatial momentum to calculate masses and related spectral data. The sum over space lattice points, however, discards information which may be useful especially in the calculation of disconnected diagrams. By using momentum conservation, the calculation of non-zero momentum components of disconnected diagrams and other quantities related to space convolutions can be done with little additional computational cost and may be useful in the analysis of disconnected correlators.