scholarly journals Absence of Coulomb Blockade in the Anderson Impurity Model at the Symmetric Point

2019 ◽  
Vol 123 (22) ◽  
pp. 13538-13544 ◽  
Author(s):  
Amikam Levy ◽  
Lyran Kidon ◽  
Jakob Bätge ◽  
Junichi Okamoto ◽  
Michael Thoss ◽  
...  
Keyword(s):  
Coulomb Blockade ◽  
Symmetric Point ◽  
Impurity Model ◽  
Anderson Impurity Model

PRECISION OF A QUANTUM CHARGE PUMP NEAR THE ADIABATIC REGIME

1994 ◽  
Vol 08 (28) ◽  
pp. 3987-4006
Author(s):  
CHIU LIU ◽  
QIAN NIU
Keyword(s):  
Exact Solution ◽  
Coulomb Blockade ◽  
Charge Pump ◽  
Time Dependent ◽  
Impurity Model ◽  
Anderson Impurity Model ◽  
Strong Coulomb ◽  
Adiabatic Regime ◽  
Energy Quantum ◽  
Quantum Charge

The precision of a quantum charge pump is studied through an exact solution of a time-dependent Schrödinger equation, and the noninteracting Anderson impurity model. An approximate solution to the interacting Anderson model in the strong Coulomb blockade limit is also presented. Near the adiabatic regime, the precision is rigorously found to depend exponentially on the operating frequency of the charge pump. The semiclassical rate equation is rederived when the temperature is higher than the energy quantum of the pumping frequency. Nonadiabatic heating to the leads is also discussed.

Anderson impurity model: Vertex corrections within the finite U non-crossing approximation

2009 ◽  
Vol 404 (18) ◽  
pp. 2861-2864 ◽  
Author(s):  
P. Roura-Bas ◽  
V. Vildosola ◽  
L.O. Manuel ◽  
A.M. Llois
Keyword(s):  
Vertex Corrections ◽  
Impurity Model ◽  
Anderson Impurity Model

KONDO EFFECT AND SPIN-CHARGE SEPARATION IN QUANTUM DOTS

2001 ◽  
Vol 15 (10n11) ◽  
pp. 1426-1442
Author(s):  
L. I. GLAZMAN ◽  
F. W. J. HEKKING ◽  
A. I. LARKIN
Keyword(s):  
Quantum Dot ◽  
Charge Separation ◽  
Coulomb Blockade ◽  
Kondo Effect ◽  
Broad Band ◽  
Single Mode ◽  
Kondo Temperature ◽  
Average Charge ◽  
Opposite Case ◽  
Anderson Impurity Model

The Kondo effect in a quantum dot is discussed. In the standard Coulomb blockade setting, tunneling between the dot and the leads is weak, the number of electrons in the dot is well-defined and discrete; the Kondo effect may be considered in the framework of the conventional one-level Anderson impurity model. It turns out however, that the Kondo temperature TK in the case of weak tunneling is extremely low. In the opposite case of almost reflectionless single-mode junctions connecting the dot to the leads, the average charge of the dot is not discrete. Surprisingly, its spin may remain quantized: s=1/2 or s=0, depending (periodically) on the gate voltage. Such a "spin-charge separation" occurs because, unlike an Anderson impurity, a quantum dot carries a broad-band, dense spectrum of discrete levels. In the doublet state, the Kondo effect develops with a significantly enhanced TK. Like in the weak-tunneling regime, the enhanced TK exhibits strong mesoscopic fluctuations. The statistics of the fluctuations is universal, and related to the Porter-Thomas statistics of the wave function fluctuations.

scholarly journals Pu 4f XPS spectra analyzed in the Anderson impurity model

1998 ◽  
Author(s):  
L.E. Cox ◽  
J.M. Peek ◽  
J.W. Allen
Keyword(s):  
Xps Spectra ◽  
Impurity Model ◽  
Anderson Impurity Model

On the CTMA for the infiniteU Anderson impurity model

2007 ◽  
Vol 244 (7) ◽  
pp. 2357-2361 ◽  
Author(s):  
Hellmut Keiter ◽  
Klaus Baumgartner ◽  
Sebastian Duffe
Keyword(s):  
Impurity Model ◽  
Anderson Impurity Model

THEORY OF POLARIZATION DEPENDENCE IN RESONANT X-RAY EMISSION SPECTRA OF A URANIUM COMPOUND

2002 ◽  
Vol 09 (02) ◽  
pp. 1149-1153 ◽  
Author(s):  
MAKOTO NAKAZAWA ◽  
HARUHIKO OGASAWARA ◽  
AKIO KOTANI
Keyword(s):  
Selection Rule ◽  
Strong Dependence ◽  
Emission Spectra ◽  
Dipole Transition ◽  
Spectral Features ◽  
X Rays ◽  
X Ray ◽  
Uranium Compound ◽  
Impurity Model ◽  
Anderson Impurity Model

We calculate the U 5f → 3d5/2 resonant X-ray emission spectra (5f → 3d5/2 RXES) of a uranium compound, UO 3, by means of the Anderson impurity model with full multiplet effects. The calculation is based on the second-order optical formula, and the effect of the X-ray polarization is taken into account. The calculated results of 5f → 3d5/2 RXES show the strong dependence on the X-ray polarization. Using the selection rule of the dipole transition with polarized X-rays, the calculated spectral features are explained.

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