A Coupled-Cluster Formulation of Hamiltonian Lattice Field Theory: The Non-Linear Sigma Model
High Energy Physics - Lattice
2009-10-30 v1 Condensed Matter
High Energy Physics - Phenomenology
Abstract
We apply the coupled cluster method (CCM) to the Hamiltonian version of the latticised O(4) non-linear 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 each other as well as with some other Hamiltonian approaches. Our study of both the ground state and collective excitations leads to indications of a possible chiral phase transition as the lattice spacing is varied.
Keywords
Cite
@article{arxiv.hep-lat/9712021,
title = {A Coupled-Cluster Formulation of Hamiltonian Lattice Field Theory: The Non-Linear Sigma Model},
author = {N. E. Ligterink and N. R. Walet and R. F. Bishop},
journal= {arXiv preprint arXiv:hep-lat/9712021},
year = {2009}
}
Comments
44 Pages, 14 figures. Uses Latex2e, graphicx, amstex and geometry packages