2001/06/03 by Akira Oguri · 5 citations
Physics and Astronomy · #Anderson impurity model #Condensed matter physics #Diagrammatic reasoning #Fermi liquid theory #Formalism (music) #Ground state #Impurity #Linear response theory #Mathematical physics #Non-equilibrium thermodynamics #Nonlinear system #Omega #Perturbation (astronomy) #Perturbation theory (quantum mechanics) #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum electrodynamics #Quantum mechanics #Semiconductor Quantum Structures and Devices #Statistical physics #Superconductivity #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.64.153305
published as Phys. Rev. B 64, 153305 (2001) · 8 pages, 1 figure
arxiv created 2001/06/03 · openalex publication_date 2001/09/28 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The low-energy properties of the Anderson impurity are studied under a finite bias voltage V using the perturbation theory in U of Yamada and Yosida in the nonequilibrium Keldysh diagrammatic formalism. The self-energy is calculated exactly up to terms of order \ensuremathω2, T2, and V2 using Ward identities. The coefficients are defined with respect to the equilibrium ground state, and contain all contributions of the perturbation series in U. From these results, the nonlinear response of the current through the impurity has been deduced up to order V3.