Full counting statistics for the Kondo dot in the unitary limit

被引:66
作者
Gogolin, A. O.
Komnik, A.
机构
[1] Univ London Imperial Coll Sci Technol & Med, Dept Math, London SW7 2AZ, England
[2] CEA Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France
关键词
D O I
10.1103/PhysRevLett.97.016602
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We calculate the charge transfer probability distribution function chi(lambda) for the Kondo dot in the strong-coupling limit within the framework of the Nozieres-Fermi-liquid theory of the Kondo effect. At zero temperature, the ratio of the moments C-n of the charge distribution to the backscattering current I-bs follows a universal law C-n/2I(bs)=(-1)(n)(1+2(n))/6. The functional form of chi(lambda) is consistent with tunneling of electrons and, possibly, electron pairs. We then discuss the crossover behavior of chi(lambda) from weak to strong Coulomb repulsion in the underlying Anderson impurity model and relate this to the existing results. Finally, we extend our analysis to the case of finite temperatures.
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页数:4
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