184 citations · 586 across the 11 of their papers we have counts for
5 papers · 1 filter
Josephson current through a single Anderson impurity coupled to BCS leads
C. Karrasch, A. Oguri, V. Meden
We investigate the Josephson current J(ϕ) through a quantum dot embedded between two superconductors showing a phase difference ϕ. The system is modeled as a single Anderson impuri…
Spectral properties of locally correlated electrons in a BCS superconductor
J Bauer, A Oguri, AC Hewson
We present a detailed study of the spectral properties of a locally correlated site embedded in a BCS superconducting medium. To this end the Anderson impurity model with supercond…
Numerical renormalization group approach to a quartet quantum-dot array connected to reservoirs:gate-voltage dependence of the conductance
Yunori Nisikawa, Akira Oguri
The ground-state properties of quartet quantum-dot arrays are studied using the numerical renormalization group (NRG) method with a four-site Hubbard model connected to two non-int…
Non-equilibrium Differential Conductance through a Quantum Dot in a Magnetic Field
A. C. Hewson, J. Bauer, A. Oguri
We derive an exact expression for the differential conductance for a quantum dot in an arbitrary magnetic field for small bias voltage. The derivation is based on the symmetric And…
Renormalized Parameters for Impurity Models
A. C. Hewson, A. Oguri, D. Meyer
We show that the low energy behaviour of quite diverse impurity systems can be described by a single renormalized Anderson model, with three parameters, an effective level $\tildeε…