Time-Dependent Gutzwiller Approximation: Theory and Applications
- The time-dependent Gutzwiller approximation is rederived on the basis of a variational wave function which is a direct product of a Slater determinant and a coherent state. The latter can be related to the slave-boson formulation by Kotliar and Ruckenstein, and our approach offers a convenient way to generalize the theory towards the implementation of symmetry-broken states and the study of non-equilibrium phenomena. We discuss the concept with regard to applications in the linear response limit and for quenched antiferromagnetic order for which we evaluate the optical conductivity in non-equilibrium situations.
Author: | Katharina Noatschk, Christian Martens, Götz SeiboldORCiD |
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URL: | https://link.springer.com/article/10.1007/s10948-019-05406-z#Sec1 |
DOI: | https://doi.org/10.1007/s10948-019-05406-z |
Title of the source (English): | Journal of Superconductivity and Novel Magnetism |
Document Type: | Scientific journal article peer-reviewed |
Language: | English |
Year of publication: | 2020 |
Tag: | Gutzwiller approximation; Hubbard model; Non-equilibrium |
Volume/Year: | 33 |
Issue number: | 8 |
First Page: | 2389 |
Last Page: | 2393 |
Faculty/Chair: | Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Computational Physics |