Evaluation techniques for Gutzwiller wave functions in finite dimensions Journal Article

Author(s): Kaczmarczyk, Jan; Schickling, Tobias; Bünemann, Jörg
Article Title: Evaluation techniques for Gutzwiller wave functions in finite dimensions
Affiliation IST Austria
Abstract: We give a comprehensive introduction into a diagrammatic method that allows for the evaluation of Gutzwiller wave functions in finite spatial dimensions. We discuss in detail some numerical schemes that turned out to be useful in the real-space evaluation of the diagrams. The method is applied to the problem of d-wave superconductivity in a two-dimensional single-band Hubbard model. Here, we discuss in particular the role of long-range contributions in our diagrammatic expansion. We further reconsider our previous analysis on the kinetic energy gain in the superconducting state.
Keywords: diagrams; Hubbard model; Superconductivity; Gutzwiller wave functions
Journal Title: Physica Status Solidi (B): Basic Research
Volume: 252
Issue 9
ISSN: 1521-3951
Publisher: Wiley-Blackwell  
Date Published: 2015-09-01
Start Page: 2059
End Page: 2071
DOI: 10.1002/pssb.201552082
Notes: The work was supported by the Ministry of Science and Higher Education in Poland through the Iuventus Plus grant No. IP2012 017172 for the years 2013–2015, as well as by the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme (FP7/2007–2013) under REA grant agreement ninline image [291734].
Open access: yes (repository)