Nonperturbative Calculation of Shear Viscosity from the Basis of the Keldysh Field in Thermal φ4 Theory

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（8）
• 页码范围: 1058-1060
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

The nonperturbative result of the shear viscosity in thermal φ4 theory is given by solving the Bethe-Salpeter (B-S) integral equation in the closed time formalism in real time. By introducing a two-legs-truncated Green function it is shown that the B-S equation is decoupled in the basis of the Keldysh field.