Abstract
The single impurity Anderson model (SIAM) in the localized moment regime is used as the generic model to analyze strong correlations in metals. As it turns out the auxiliary particle representation is a convenient way for formulating selfconsistent approximations for SIAMs. We discuss the Non-Crossing Approximation, or NCA, one of the simplest approximations possible and point out why massive parallel machines are necessary when going beyond NCA. The CTMA, an approximation capable of describing the correct groundstate and the SUNCA for impurity systems with finite Coulomb repulsion are discussed and numerical results are presented.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
