Scaling and decoherence in the nonequilibrium Kondo model.
Scaling and decoherence in the nonequilibrium Kondo model.
复制标题
非平衡近藤模型中的缩放和退相干。
DOI:
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发表时间:
2004
影响因子:
8.6
通讯作者:
S. Kehrein
中科院分区:
文献类型:
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作者:
S. Kehrein
We study the Kondo effect in quantum dots in an out-of-equilibrium state due to an applied dc-voltage bias. Using the method of infinitesimal unitary transformations ("flow equations"), we develop a perturbative scaling picture that naturally contains both equilibrium coherence and nonequilibrium decoherence effects. This framework allows one to study the competition between Kondo effect and current-induced decoherence, and it establishes a large regime dominated by single-channel Kondo physics for asymmetrically coupled quantum dots.