Nonequilibrium Transport at a Dissipative Quantum Phase Transition

被引：31

作者：

Chung, Chung-Hou ^{[1
]}

Le Hur, Karyn ^{[2
]}

Vojta, Matthias ^{[3
]}

Woelfle, Peter ^{[4
,5
]}

机构：

[1] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30050, Taiwan

[2] Yale Univ, Dept Phys & Appl Phys, New Haven, CT USA

[3] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany

[4] Univ Karlsruhe, Inst Theorie Kondensierten Mat, D-76128 Karlsruhe, Germany

[5] Forschungszentrum, INT, D-76021 Karlsruhe, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.102.216803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the nonequilibrium transport near a quantum phase transition in a generic and relatively simple model, the dissipative resonant level model, that has many applications for nanosystems. We formulate a rigorous mapping and apply a controlled frequency-dependent renormalization group approach to compute the nonequilibrium current in the presence of a finite bias voltage V and a finite temperature T. For V -> 0, we find that the conductance has its well-known equilibrium form, while it displays a distinct nonequilibrium profile at finite voltage.

引用

页数：4

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