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

被引：1

作者：

Yang, Ke ^{[1
]}

Tong, Ning-Hua ^{[1
]}

机构：

[1] Renmin Univ China, Dept Phys, Beijing 100072, Peoples R China

来源：

CHINESE PHYSICS B | 2021年 / 30卷 / 04期

基金：

中国国家自然科学基金;

关键词：

spin-boson model; full-density matrix renormalization group; quantum phase transition; dynamical correlation function; finite temperature; NUMERICAL RENORMALIZATION-GROUP;

D O I：

10.1088/1674-1056/abd393

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use the full-density matrix numerical renormalization group method to calculate the equilibrium dynamical correlation function C(omega) of the spin operator sigma(z) at finite temperature for the sub-ohmic spin-boson model. A peak is observed at the frequency omega(T) similar to T in the curve of C(omega). The curve merges with the zero-temperature C(omega) in omega >> omega(T) and deviates significantly from the zero-temperature curve in omega MUCH LESS-THAN omega(T).

引用

页数：7

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