标题： 固定拓扑下的动力学重叠费米子 显示英文标题

标题： Dynamical overlap fermion at fixed topology

摘要： 我们启动了一个项目，使用重叠费米子公式对海夸克进行动态费米子模拟。 为了避免厄米特威尔逊-狄拉克算子$H_W$出现近零模，我们引入了一对带有大负质量项的额外威尔逊费米子。 然后严格禁止穿越拓扑边界，模拟过程中拓扑电荷保持守恒。 与允许拓扑变化的算法相比，这使模拟显著加快。 我们讨论了由于固定全局拓扑引起的有限体积效应。 显示英文摘要

摘要： We launched a project to perform dymanical fermion simulations using the overlap fermion formulation for sea quarks. In order to avoid the appearace of near-zero modes of the hermitian Wilson-Dirac operator $H_W$, we introduce a pair of extra Wilson fermions with a large negative mass term. Crossing of the topological boundary is then strictly prohibited, and the topological charge is conserved during simulations. It makes the simulations substantially faster compared to the algorithms which allow the topology change. We discuss on the finite volume effects due to the fixed global topology.