Topological susceptibility from overlap fermion

• 来源期刊: 中国物理（英文版）
• 关键词: lattice QCD topological charge overlap fermion
• 年，卷（期）: 2003,（12）
• 页码范围: 1374-1377
• 页数: 4页
• 语种: 英文

摘要

We numerically calculate the topological charge of the gauge configurations on a finite lattice by the fermionic method with overlap fermions. By using the lattice index theorem, we identify the index of the massless overlap fermion operator to the topological charge of the background gauge configuration. The resulting topological susceptibility X is in good agreement with the anticipation made by Witten and Veneziano.