scholarly journals Numerically exact long-time magnetization dynamics at the nonequilibrium Kondo crossover of the Anderson impurity model

2013 ◽  
Vol 87 (19) ◽  
Author(s):  
Guy Cohen ◽  
Emanuel Gull ◽  
David R. Reichman ◽  
Andrew J. Millis ◽  
Eran Rabani
Keyword(s):  
Magnetization Dynamics ◽  
Impurity Model ◽  
Anderson Impurity Model ◽  
Long Time

scholarly journals Exact real-time dynamics of single-impurity Anderson model from a single-spin hybridization-expansion

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Patryk Kubiczek ◽  
Alexey Rubtsov ◽  
Alexander Lichtenstein
Keyword(s):  
Real Time ◽  
Continuous Time ◽  
Quantum Monte Carlo ◽  
Time Dynamics ◽  
Single Spin ◽  
Impurity Model ◽  
Sign Problem ◽  
Spin Polarized ◽  
Anderson Impurity Model ◽  
Long Time

In this work we introduce a modified real-time continuous-time hybridization-expansion quantum Monte Carlo solver for a time-dependent single-orbital Anderson impurity model: CT-1/2-HYB-QMC. In the proposed method the diagrammatic expansion is performed only for one out of the two spin channels, while the resulting effective single-particle problem for the other spin is solved semi-analytically for each expansion diagram. CT-1/2-HYB-QMC alleviates the dynamical sign problem by reducing the order of sampled diagrams and makes it possible to reach twice as long time scales in comparison to the standard CT-HYB method. We illustrate the new solver by calculating an electric current through impurity in paramagnetic and spin-polarized cases.

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

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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