LOW-LYING EXCITATION SPECTRUM OF QUANTUM MANY-BODY SYSTEMS

Authors
MONTHOUX P MANOUSAKIS E
Citation
P. Monthoux et E. Manousakis, LOW-LYING EXCITATION SPECTRUM OF QUANTUM MANY-BODY SYSTEMS, Physical review. B, Condensed matter, 54(21), 1996, pp. 15101-15108
Citations number
16
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
54
Issue
21
Year of publication
1996
Pages
15101 - 15108
Database
ISI
SICI code
0163-1829(1996)54:21<15101:LESOQM>2.0.ZU;2-H
Abstract
We present a numerical method for calculating the ground state correla tions and low-lying excitations in a discrete and finite many-body sys tem. The method combines the advantages of real space and momentum spa ce renormalization group ideas and is similar in many respects to the correlated basis functions perturbation theory, but is nonperturbative in nature. To illustrate the method, we apply it to the one-dimension al Heisenberg antiferromagnetic spin-1/2 chain.