English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We demonstrate the utility of effective Hamilonians for studying stronglycorrelated systems, such as quantum spin systems. After defining local relevantdegrees of freedom, the numerical Contractor Renormalization (CORE) method isapplied in two steps:  (i) building an effective Hamiltonian with longer ranged interactions up to acertain cut-off using the CORE algorithm and  (ii) solving this new model numerically on finite clusters by exactdiagonalization and performing finite-size extrapolations to obtain results inthe thermodynamic limit.  This approach, giving complementary information to analytical treatments ofthe CORE Hamiltonian, can be used as a semi-quantitative numerical method tostudy frustrated magnets (as the S=1/2 kagome lattice) or doped systems.Comment: Proceedings of the conference on 'Effective Models for  Low-Dimensional Strongly Correlated Systems', Peyresq, September 2005. 11  pages, 10 Figure

Numerical Contractor Renormalization applied to strongly correlated systems