High-order coupled cluster method calculations of spontaneous symmetry breaking in the spin-half one-dimensional J₁-J₂ model

• Published in: Condensed Matter Physics
• Date: 2009
• Main Author: Farnell, D.J.J.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2009
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/120014
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: High-order coupled cluster method calculations of spontaneous symmetry breaking in the spin-half one-dimensional J₁-J₂ model / D.J.J. Farnell // Condensed Matter Physics. — 2009. — Т. 12, № 3. — С. 411-428. — Бібліогр.: 86 назв. — англ.

In this article we present new formalism for high-order coupled cluster method (CCM) calculations for generalized
 ground-state expectation values and the excited states of quantum magnetic systems with spin
 quantum number s ≥ 1/2 . We use high-order CCM to demonstrate spontaneou...