1/(N − 1) expansion approach to full-counting statistics for the SU(N) Anderson model

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書誌事項

公開日
2013-08
資源種別
journal article
権利情報
  • http://www.springer.com/tdm
DOI
  • 10.3938/jkps.63.423
  • 10.48550/arxiv.1210.3227
公開者
Korean Physical Society

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説明

We apply a recently developed 1/(N-1) expansion to the full counting statistics for the N-fold degenerate Anderson impurity model in the Kondo regime. This approach is based on the perturbation theory in the Coulomb interaction U and is different from the conventional large N theories, such as the usual 1/N expansion and non-crossing approximation. We have confirmed that the calculations carried out up to order 1/(N-1)^2 agree closely with those of the numerical renormalization group at N=4, where the degeneracy is still not so large. This ensures the applicability of our approach for N>4. We present the results of the cumulants of the probability distribution function for a nonequilibrium current through a quantum dot in the particle-hole symmetric case.

4 pages, 6 figures, typos have been corrected

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