A Coupled-Cluster Formulation of Hamilto
โ
N.E. Ligterink; N.R. Walet; R.F. Bishop
๐
Article
๐
1998
๐
Elsevier Science
๐
English
โ 591 KB
We apply the coupled cluster method (CCM) to the Hamiltonian version of the latticised O(4) nonlinear sigma model. The method, which was initially developed for the accurate description of quantum many-body systems, gives rise to two distinct approximation schemes. These approaches are compared with