Equilibrium dynamics of the dissipative two-state system

被引：98

作者：

Costi, TA ^{[1
]}

Kieffer, C ^{[1
]}

机构：

[1] UNIV KARLSRUHE, INST THEORIE KONDENSIERTEN MAT, D-76128 KARLSRUHE, GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.76.1683

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Wilson's momentum shell renormalization group method is used to solve for the dynamics of the dissipative two-state system. We utilize the mapping of the spin-boson model onto the anisotropic Kondo model (AKM) and solve for the dynamics of the latter. We find that the AKM captures the physics of the dissipative two-state system for dissipation strength 0 less than or equal to alpha less than or equal to 4 corresponding to infinity greater than or equal to J(parallel to) greater than or equal to -infinity in the AKM. The dynamics of the AKM shows a smooth crossover between two strong coupling regimes corresponding to weak and strong dissipation in the spin-boson model.

引用

页码：1683 / 1686

页数：4

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