Equilibrium dynamics of the sub-ohmic spin-boson model at finite temperature

• 作者: Ke Yang Ning-Hua Tong
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: GENERAL
• 页码范围: 178-185
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/abd393

摘要

We use the full-density matrix numerical renormalization group method to calculate the equilibrium dynamical corre-lation function C(ω)of the spin operator σz at finite temperature for the sub-ohmic spin-boson model.A peak is observed at the frequency ωT～T in the curve of C(ω).The curve merges with the zero-temperature C(ω)in ω>>ωT and deviates significantly from the zero-temperature curve in ω<<ωT.