The DSUBm approximation scheme for the coupled cluster method and applications to quantum magnets

• Published in: Condensed Matter Physics
• Date: 2009
• Main Authors: Bishop, R.F., Li, P.H.Y., Schulenburg, J.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2009
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/120023
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: The DSUBm approximation scheme for the coupled cluster method and applications to quantum magnets / R.F. Bishop, P.H.Y. Li, J. Schulenburg // Condensed Matter Physics. — 2009. — Т. 12, № 3. — С. 479-496. — Бібліогр.: 43 назв. — англ.

A new approximate scheme, DSUBm, is described for the coupled cluster method. We apply it to two wellstudied
 (spin-1/2 Heisenberg antiferromagnet) spin-lattice models, namely: the XXZ and the XY models
 on the square lattice in two dimensions. Results are obtained in each case for t...