块Krylov子空间算法在格点量子色动力学多右端Wilson-Dirac方程中的应用
Application of block Krylov subspace algorithms to the Wilson-Dirac equation with multiple right-hand sides in lattice QCD
摘要：
众所周知，块Krylov子空间求解器对于某些情况下具有多个右手边的微分方程的解是有效的。在格点量子色动力学中，对给定组态上的物理量的计算需要求解多源Dirac方程。我们表明，一个新的块Krylov子空间算法最近提出的作者大大降低了计算成本，而不失去数值精度的O（a）-改进的威尔逊-狄拉克方程的解决方案。
英文摘要：
It is well known that the block Krylov subspace solvers work efficiently for some cases of the solution of differential equations with multiple right-hand sides. In lattice QCD calculation of physical quantities on a given configuration demands us to solve the Dirac equation with multiple sources. We show that a new block Krylov subspace algorithm recently proposed by the authors reduces the computational cost significantly without loosing numerical accuracy for the solution of the O(a)-improved Wilson-Dirac equation.
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