Zobrazeno 1 - 10
of 286
pro vyhledávání: '"Vollhardt, Dieter"'
Autor:
Vollhardt, Dieter
Publikováno v:
E. Pavarini, E. Koch, A. Lichtenstein, and D. Vollhardt (eds.): Dynamical Mean-Field Theory of Correlated Electrons, Modeling and Simulation, Vol. 12, Verlag des Forschungszentrums J\"ulich, 2022, ISBN 978-3-95806-619-9
A pedagogical introduction to solving classical and quantum many-body models in infinite spatial dimensions is given. The solution of the Hubbard model obtained in this limit is discussed in detail. It corresponds to a dynamical mean-field theory, wh
Externí odkaz:
http://arxiv.org/abs/2210.06072
Autor:
Vollhardt, Dieter
Publikováno v:
JPS Conf. Proc. 30, 011001 (2020)
Dynamical Mean-Field Theory (DMFT) has opened new perspectives for the investigation of strongly correlated electron systems and greatly improved our understanding of correlation effects in models and materials. In contrast to Hartree-Fock-type appro
Externí odkaz:
http://arxiv.org/abs/1910.12650
Publikováno v:
In Colloids and Surfaces A: Physicochemical and Engineering Aspects 20 June 2023 667
Publikováno v:
In JCIS Open October 2022 7
Autor:
Weber, Josef Andreas, Benea, Diana, Appelt, Wilhelm H., Ceeh, Hubert, Kreuzpaintner, Wolfgang, Leitner, Michael, Vollhardt, Dieter, Hugenschmidt, Christoph, Chioncel, Liviu
Publikováno v:
Phys. Rev. B 95, 075119 (2017)
The electronic structure of vanadium measured by Angular Correlation of electron-positron Annihilation Radiation (ACAR) is compared with the predictions of the combined Density Functional and Dynamical Mean-Field Theory (DMFT). Reconstructing the mom
Externí odkaz:
http://arxiv.org/abs/1611.05361
Publikováno v:
Phys. Rev. B 92, 045102 (2015)
We calculate the momentum dependent spectral function of the Bose-Hubbard model on a simple cubic lattice in three dimensions within the bosonic dynamical mean-field theory (B-DMFT). The continuous-time quantum Monte Carlo method is used to solve the
Externí odkaz:
http://arxiv.org/abs/1503.04993
Autor:
Ceeh, Hubert, Weber, Josef-Andreas, Böni, Peter, Leitner, Michael, Benea, Diana, Chioncel, Liviu, Vollhardt, Dieter, Ebert, Hubert, Minar, Jan, Hugenschmidt, Christoph
Publikováno v:
Scientific Reports 6, 2016
The two-photon momentum distribution of annihilating electron-positron pairs in ferromagnetic nickel (Ni) was determined by measuring the spin-polarized two-dimensional angular correlation of annihilation radiation (ACAR). The spectra were compared w
Externí odkaz:
http://arxiv.org/abs/1501.02584
Autor:
Otsuki, Junya, Vollhardt, Dieter
Publikováno v:
Phys. Rev. Lett. 110, 196407 (2013)
To explore the nature of the metallic state near the transition to a Mott insulator we investigate the t-J model with random exchange interaction in d=infinity dimensions. A numerically exact solution is obtained by an extension of the continuous-tim
Externí odkaz:
http://arxiv.org/abs/1212.4022
Publikováno v:
Phys. Rev. Lett. 110, 046403 (2013)
We calculate the spectra and spin susceptibilities of a Hubbard model with two bands having different bandwidths but the same on-site interaction, with parameters close to the orbital-selective Mott transition, using dynamical mean-field theory. If t
Externí odkaz:
http://arxiv.org/abs/1205.5782
Publikováno v:
Phys. Rev. B 85, 205115 (2012)
We derive an approximate analytical solution of the self-consistency equations of the bosonic dynamical mean-field theory (B-DMFT) in the strong-coupling limit. The approach is based on a linked-cluster expansion in the hybridization function of norm
Externí odkaz:
http://arxiv.org/abs/1203.1236