2020/01/31 by Yoshimichi Teratani, Rui Sakano, Akira Oguri · 18 citations
Physics and Astronomy · #Anderson impurity model #Condensed matter physics #Electron #Fermi energy #Fermi gas #Fermi liquid theory #Impurity #Kondo effect #Luttinger liquid #Non-equilibrium thermodynamics #Nonlinear system #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Quasiparticle #Renormalization #Renormalization group #Semiconductor Quantum Structures and Devices #Strongly correlated material #Superconductivity #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.125.216801
published in Physical Review Letters 125(21), 216801 (American Physical Society) · 5 pages, 8 figures, supplemental material containing 8 figures
arxiv created 2020/11/05 · openalex publication_date 2020/11/17 · arxiv updated 2020/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We present a microscopic Fermi liquid view on the low-energy transport through an Anderson impurity with N discrete levels, at arbitrary electron filling Nd. It is applied to nonequilibrium current fluctuations, for which the two-quasiparticle collision integral and the three-body correlations that determine the quasiparticle energy shift play important roles. Using the numerical renormalization group up to N=6, we find that for strong interactions the three-body fluctuations are determined by a single parameter other than the Kondo energy scale in a wide filling range 1≲Nd≲N-1. It significantly affects the current noise for N>2 and the behavior of noise in magnetic fields.